diff --git a/packages/dify-ui/src/autocomplete/__tests__/index.spec.tsx b/packages/dify-ui/src/autocomplete/__tests__/index.spec.tsx
index 72ed042033..d0cab69401 100644
--- a/packages/dify-ui/src/autocomplete/__tests__/index.spec.tsx
+++ b/packages/dify-ui/src/autocomplete/__tests__/index.spec.tsx
@@ -218,6 +218,8 @@ describe('Autocomplete wrappers', () => {
       await expect.element(screen.getByText('Workflow')).toHaveClass('system-sm-medium')
       await expect.element(screen.getByTestId('status')).toHaveClass('text-text-tertiary')
       await expect.element(screen.getByTestId('empty')).toHaveClass('system-sm-regular')
+      await expect.element(screen.getByTestId('empty')).toHaveClass('empty:p-0')
+      expect(screen.getByTestId('empty').element().getBoundingClientRect().height).toBe(0)
       expect(screen.getByText('Workflow').element().parentElement?.querySelector('.i-ri-arrow-right-line')).toHaveAttribute('aria-hidden', 'true')
     })
 
@@ -248,5 +250,34 @@ describe('Autocomplete wrappers', () => {
       await expect.element(screen.getByText('Workflow')).toHaveClass('custom-text')
       await expect.element(screen.getByTestId('indicator')).toHaveClass('custom-indicator')
     })
+
+    it('should navigate function-rendered items with arrow keys', async () => {
+      const screen = await renderWithSafeViewport(
+        <Autocomplete open defaultValue="" items={['workflow', 'dataset', 'app']}>
+          <AutocompleteInputGroup>
+            <AutocompleteInput aria-label="Search resources" />
+          </AutocompleteInputGroup>
+          <AutocompleteContent>
+            <AutocompleteList>
+              {(item: string) => (
+                <AutocompleteItem key={item} value={item}>
+                  <AutocompleteItemText>{item}</AutocompleteItemText>
+                </AutocompleteItem>
+              )}
+            </AutocompleteList>
+          </AutocompleteContent>
+        </Autocomplete>,
+      )
+
+      const input = asHTMLElement(screen.getByRole('combobox', { name: 'Search resources' }).element())
+
+      input.focus()
+      input.dispatchEvent(new KeyboardEvent('keydown', { key: 'ArrowDown', bubbles: true, cancelable: true }))
+      await expect.element(screen.getByRole('option', { name: 'workflow' })).toHaveAttribute('data-highlighted')
+
+      input.dispatchEvent(new KeyboardEvent('keydown', { key: 'ArrowDown', bubbles: true, cancelable: true }))
+
+      await expect.element(screen.getByRole('option', { name: 'dataset' })).toHaveAttribute('data-highlighted')
+    })
   })
 })
diff --git a/packages/dify-ui/src/autocomplete/index.stories.tsx b/packages/dify-ui/src/autocomplete/index.stories.tsx
index 79f8983cd2..6de6b16766 100644
--- a/packages/dify-ui/src/autocomplete/index.stories.tsx
+++ b/packages/dify-ui/src/autocomplete/index.stories.tsx
@@ -160,12 +160,36 @@ const virtualizedSuggestions: Suggestion[] = Array.from({ length: 1000 }, (_, in
 const getSuggestionLabel = (item: Suggestion) => item.label
 
 const SuggestionItem = ({
+  item,
+  dense,
+}: {
+  item: Suggestion
+  dense?: boolean
+}) => (
+  <AutocompleteItem value={item}>
+    {item.icon && <span className={cn(item.icon, 'size-4 shrink-0 text-text-tertiary')} aria-hidden="true" />}
+    <div className="flex min-w-0 grow flex-col">
+      <AutocompleteItemText className="px-0">{item.label}</AutocompleteItemText>
+      {!dense && item.description && (
+        <span className="truncate system-xs-regular text-text-tertiary">{item.description}</span>
+      )}
+    </div>
+    {item.meta && (
+      <span className="shrink-0 rounded-md bg-components-badge-bg-dimm px-1.5 py-0.5 system-2xs-medium text-text-tertiary">
+        {item.meta}
+      </span>
+    )}
+  </AutocompleteItem>
+)
+
+// Only virtualized items receive an explicit index; ordinary lists must let Base UI register items by DOM order for keyboard navigation.
+const VirtualizedSuggestionItem = ({
   item,
   index,
   dense,
 }: {
   item: Suggestion
-  index?: number
+  index: number
   dense?: boolean
 }) => (
   <AutocompleteItem value={item} index={index}>
@@ -186,12 +210,10 @@ const SuggestionItem = ({
 
 const TagSuggestionItem = ({
   item,
-  index,
 }: {
   item: Suggestion
-  index?: number
 }) => (
-  <AutocompleteItem value={item} index={index}>
+  <AutocompleteItem value={item}>
     <AutocompleteItemText className="px-0">{item.label}</AutocompleteItemText>
     {item.description && <span className="ml-auto max-w-36 truncate system-xs-regular text-text-tertiary">{item.description}</span>}
   </AutocompleteItem>
@@ -215,8 +237,8 @@ const BasicTagAutocomplete = ({
     </AutocompleteInputGroup>
     <AutocompleteContent>
       <AutocompleteList>
-        {(item: Suggestion, index: number) => (
-          <TagSuggestionItem key={item.value} item={item} index={index} />
+        {(item: Suggestion) => (
+          <TagSuggestionItem key={item.value} item={item} />
         )}
       </AutocompleteList>
       <AutocompleteEmpty>No tag suggestion. Keep the typed value.</AutocompleteEmpty>
@@ -327,8 +349,8 @@ const AsyncSearchDemo = () => {
             {loading ? 'Loading suggestions…' : `${items.length} remote suggestions`}
           </AutocompleteStatus>
           <AutocompleteList>
-            {(item: Suggestion, index: number) => (
-              <SuggestionItem key={item.value} item={item} index={index} />
+            {(item: Suggestion) => (
+              <SuggestionItem key={item.value} item={item} />
             )}
           </AutocompleteList>
           <AutocompleteEmpty>No remote suggestion. Keep the typed query.</AutocompleteEmpty>
@@ -384,7 +406,7 @@ const VirtualizedSuggestionList = ({
                 transform: `translateY(${virtualItem.start}px)`,
               }}
             >
-              <SuggestionItem item={item} index={virtualItem.index} />
+              <VirtualizedSuggestionItem item={item} index={virtualItem.index} />
             </div>
           )
         })}
@@ -455,8 +477,8 @@ const FuzzyMatchingDemo = () => {
         </AutocompleteInputGroup>
         <AutocompleteContent>
           <AutocompleteList>
-            {(item: Suggestion, index: number) => (
-              <AutocompleteItem key={item.value} value={item} index={index}>
+            {(item: Suggestion) => (
+              <AutocompleteItem key={item.value} value={item}>
                 {item.icon && <span className={cn(item.icon, 'size-4 shrink-0 text-text-tertiary')} aria-hidden="true" />}
                 <div className="min-w-0 grow">
                   <AutocompleteItemText className="block px-0">
@@ -528,8 +550,8 @@ export const InlineAutocomplete: Story = {
         </AutocompleteInputGroup>
         <AutocompleteContent>
           <AutocompleteList>
-            {(item: Suggestion, index: number) => (
-              <SuggestionItem key={item.value} item={item} index={index} dense />
+            {(item: Suggestion) => (
+              <SuggestionItem key={item.value} item={item} dense />
             )}
           </AutocompleteList>
           <AutocompleteEmpty>No inline completion. Continue typing freely.</AutocompleteEmpty>
@@ -586,8 +608,8 @@ export const LimitResults: Story = {
             <LimitedStatus total={workflowSuggestions.length} />
           </AutocompleteStatus>
           <AutocompleteList>
-            {(item: Suggestion, index: number) => (
-              <SuggestionItem key={item.value} item={item} index={index} />
+            {(item: Suggestion) => (
+              <SuggestionItem key={item.value} item={item} />
             )}
           </AutocompleteList>
           <AutocompleteEmpty>No suggestion. Submit the typed text instead.</AutocompleteEmpty>
@@ -674,8 +696,8 @@ export const Empty: Story = {
         </AutocompleteInputGroup>
         <AutocompleteContent>
           <AutocompleteList>
-            {(item: Suggestion, index: number) => (
-              <TagSuggestionItem key={item.value} item={item} index={index} />
+            {(item: Suggestion) => (
+              <TagSuggestionItem key={item.value} item={item} />
             )}
           </AutocompleteList>
           <AutocompleteEmpty>No tag suggestion. The custom text remains valid.</AutocompleteEmpty>
@@ -696,8 +718,8 @@ export const DisabledAndReadOnly: Story = {
         </AutocompleteInputGroup>
         <AutocompleteContent>
           <AutocompleteList>
-            {(item: Suggestion, index: number) => (
-              <TagSuggestionItem key={item.value} item={item} index={index} />
+            {(item: Suggestion) => (
+              <TagSuggestionItem key={item.value} item={item} />
             )}
           </AutocompleteList>
         </AutocompleteContent>
@@ -710,8 +732,8 @@ export const DisabledAndReadOnly: Story = {
         </AutocompleteInputGroup>
         <AutocompleteContent>
           <AutocompleteList>
-            {(item: Suggestion, index: number) => (
-              <SuggestionItem key={item.value} item={item} index={index} />
+            {(item: Suggestion) => (
+              <SuggestionItem key={item.value} item={item} />
             )}
           </AutocompleteList>
         </AutocompleteContent>
diff --git a/packages/dify-ui/src/autocomplete/index.tsx b/packages/dify-ui/src/autocomplete/index.tsx
index 7543ab157b..8139d16f40 100644
--- a/packages/dify-ui/src/autocomplete/index.tsx
+++ b/packages/dify-ui/src/autocomplete/index.tsx
@@ -346,7 +346,7 @@ export function AutocompleteEmpty({
 }: BaseAutocomplete.Empty.Props) {
   return (
     <BaseAutocomplete.Empty
-      className={cn('px-3 py-2 system-sm-regular text-text-tertiary', className)}
+      className={cn('px-3 py-2 system-sm-regular text-text-tertiary empty:h-0 empty:p-0', className)}
       {...props}
     />
   )
diff --git a/packages/dify-ui/src/combobox/__tests__/index.spec.tsx b/packages/dify-ui/src/combobox/__tests__/index.spec.tsx
index 5d5dc31be7..043e0a2e1a 100644
--- a/packages/dify-ui/src/combobox/__tests__/index.spec.tsx
+++ b/packages/dify-ui/src/combobox/__tests__/index.spec.tsx
@@ -277,6 +277,8 @@ describe('Combobox wrappers', () => {
       await expect.element(screen.getByTestId('list').getByText('Workflow')).toHaveClass('system-sm-medium')
       await expect.element(screen.getByTestId('status')).toHaveClass('text-text-tertiary')
       await expect.element(screen.getByTestId('empty')).toHaveClass('system-sm-regular')
+      await expect.element(screen.getByTestId('empty')).toHaveClass('empty:p-0')
+      expect(screen.getByTestId('empty').element().getBoundingClientRect().height).toBe(0)
       expect(screen.getByTestId('list').getByText('Workflow').element().parentElement?.querySelector('.i-ri-check-line')).toHaveAttribute('aria-hidden', 'true')
     })
 
@@ -307,6 +309,36 @@ describe('Combobox wrappers', () => {
       await expect.element(screen.getByTestId('custom-list').getByText('Workflow')).toHaveClass('custom-text')
       await expect.element(screen.getByTestId('indicator')).toHaveClass('custom-indicator')
     })
+
+    it('should navigate function-rendered items with arrow keys', async () => {
+      const screen = await renderWithSafeViewport(
+        <Combobox defaultValue="workflow" items={['workflow', 'dataset', 'app']}>
+          <ComboboxInputGroup>
+            <ComboboxInput aria-label="Search resources" />
+          </ComboboxInputGroup>
+          <ComboboxContent>
+            <ComboboxList>
+              {(item: string) => (
+                <ComboboxItem key={item} value={item}>
+                  <ComboboxItemText>{item}</ComboboxItemText>
+                  <ComboboxItemIndicator />
+                </ComboboxItem>
+              )}
+            </ComboboxList>
+          </ComboboxContent>
+        </Combobox>,
+      )
+
+      const input = asHTMLElement(screen.getByRole('combobox', { name: 'Search resources' }).element())
+
+      input.focus()
+      input.dispatchEvent(new KeyboardEvent('keydown', { key: 'ArrowDown', bubbles: true, cancelable: true }))
+      await expect.element(screen.getByRole('option', { name: 'workflow' })).toHaveAttribute('data-highlighted')
+
+      input.dispatchEvent(new KeyboardEvent('keydown', { key: 'ArrowDown', bubbles: true, cancelable: true }))
+
+      await expect.element(screen.getByRole('option', { name: 'dataset' })).toHaveAttribute('data-highlighted')
+    })
   })
 
   describe('Multiple selection chips', () => {
@@ -314,19 +346,21 @@ describe('Combobox wrappers', () => {
       const screen = await renderWithSafeViewport(
         <Combobox multiple defaultValue={['maya']} items={['maya', 'nora']}>
           <ComboboxInputGroup>
-            <ComboboxValue>
-              {(selectedValue: string[]) => (
-                <ComboboxChips className="custom-chips" data-testid="chips">
-                  {selectedValue.map(item => (
-                    <ComboboxChip key={item} className="custom-chip">
-                      <span>{item}</span>
-                      <ComboboxChipRemove data-testid="remove-chip" />
-                    </ComboboxChip>
-                  ))}
-                </ComboboxChips>
-              )}
-            </ComboboxValue>
-            <ComboboxInput aria-label="Reviewers" />
+            <ComboboxChips className="custom-chips" data-testid="chips">
+              <ComboboxValue>
+                {(selectedValue: string[]) => (
+                  <>
+                    {selectedValue.map(item => (
+                      <ComboboxChip key={item} className="custom-chip">
+                        <span>{item}</span>
+                        <ComboboxChipRemove data-testid="remove-chip" />
+                      </ComboboxChip>
+                    ))}
+                    <ComboboxInput aria-label="Reviewers" />
+                  </>
+                )}
+              </ComboboxValue>
+            </ComboboxChips>
           </ComboboxInputGroup>
         </Combobox>,
       )
@@ -341,19 +375,21 @@ describe('Combobox wrappers', () => {
       const screen = await renderWithSafeViewport(
         <Combobox multiple defaultValue={['maya']} items={['maya']}>
           <ComboboxInputGroup>
-            <ComboboxValue>
-              {(selectedValue: string[]) => (
-                <ComboboxChips>
-                  {selectedValue.map(item => (
-                    <ComboboxChip key={item}>
-                      <span id="remove-maya">Remove Maya</span>
-                      <ComboboxChipRemove aria-labelledby="remove-maya" />
-                    </ComboboxChip>
-                  ))}
-                </ComboboxChips>
-              )}
-            </ComboboxValue>
-            <ComboboxInput aria-label="Reviewers" />
+            <ComboboxChips>
+              <ComboboxValue>
+                {(selectedValue: string[]) => (
+                  <>
+                    {selectedValue.map(item => (
+                      <ComboboxChip key={item}>
+                        <span id="remove-maya">Remove Maya</span>
+                        <ComboboxChipRemove aria-labelledby="remove-maya" />
+                      </ComboboxChip>
+                    ))}
+                    <ComboboxInput aria-label="Reviewers" />
+                  </>
+                )}
+              </ComboboxValue>
+            </ComboboxChips>
           </ComboboxInputGroup>
         </Combobox>,
       )
diff --git a/packages/dify-ui/src/combobox/index.stories.tsx b/packages/dify-ui/src/combobox/index.stories.tsx
index c5ca18f282..c788490268 100644
--- a/packages/dify-ui/src/combobox/index.stories.tsx
+++ b/packages/dify-ui/src/combobox/index.stories.tsx
@@ -177,11 +177,11 @@ const defaultDataSource = dataSourceOptions[0]!
 const defaultPopupDataSource = dataSourceOptions[1]!
 const readOnlyDataSource = dataSourceOptions[2]!
 const defaultTool = toolGroups[0]!.items[0]!
-const defaultReviewers = [reviewerOptions[0]!, reviewerOptions[1]!, reviewerOptions[2]!, reviewerOptions[3]!]
+const defaultReviewers = [reviewerOptions[0]!, reviewerOptions[1]!]
 const defaultTag = tagOptions[2]!
 
-const renderOptionItem = (option: Option, index?: number) => (
-  <ComboboxItem key={option.value} value={option} index={index} disabled={option.disabled} className="h-auto min-h-8 py-1.5">
+const renderOptionItem = (option: Option) => (
+  <ComboboxItem key={option.value} value={option} disabled={option.disabled} className="h-auto min-h-8 py-1.5">
     <ComboboxItemText className="flex items-center gap-2 px-0">
       {option.icon && <span aria-hidden className={cn(option.icon, 'size-4 shrink-0 text-text-tertiary')} />}
       <span className="min-w-0 flex-1">
@@ -193,13 +193,27 @@ const renderOptionItem = (option: Option, index?: number) => (
   </ComboboxItem>
 )
 
-const renderSimpleOptionItem = (option: Option, index?: number) => (
-  <ComboboxItem key={option.value} value={option} index={index}>
+const renderSimpleOptionItem = (option: Option) => (
+  <ComboboxItem key={option.value} value={option}>
     <ComboboxItemText>{option.label}</ComboboxItemText>
     <ComboboxItemIndicator />
   </ComboboxItem>
 )
 
+// Only virtualized items receive an explicit index; ordinary lists must let Base UI register items by DOM order for keyboard navigation.
+const renderVirtualizedOptionItem = (option: Option, index: number) => (
+  <ComboboxItem key={option.value} value={option} index={index} disabled={option.disabled} className="h-auto min-h-8 py-1.5">
+    <ComboboxItemText className="flex items-center gap-2 px-0">
+      {option.icon && <span aria-hidden className={cn(option.icon, 'size-4 shrink-0 text-text-tertiary')} />}
+      <span className="min-w-0 flex-1">
+        <span className="block truncate text-text-secondary system-sm-medium">{option.label}</span>
+        {option.meta && <span className="block truncate text-text-tertiary system-xs-regular">{option.meta}</span>}
+      </span>
+    </ComboboxItemText>
+    <ComboboxItemIndicator />
+  </ComboboxItem>
+)
+
 const PopupSearchInput = ({
   label,
   placeholder,
@@ -282,7 +296,7 @@ const VirtualizedModelList = ({
                 transform: `translateY(${virtualItem.start}px)`,
               }}
             >
-              {renderOptionItem(option, virtualItem.index)}
+              {renderVirtualizedOptionItem(option, virtualItem.index)}
             </div>
           )
         })}
@@ -314,7 +328,6 @@ const VirtualizedLongListDemo = () => {
         value={value}
         onValueChange={setValue}
         virtualized
-        autoHighlight
         onItemHighlighted={(item, details) => {
           scrollHighlightedVirtualItem(item, details, virtualizerRef.current)
         }}
@@ -364,7 +377,6 @@ const AsyncDirectoryDemo = () => {
         onValueChange={setValue}
         inputValue={inputValue}
         onInputValueChange={setInputValue}
-        autoHighlight
       >
         <ComboboxInputGroup className="h-8 min-h-8 px-2">
           <span aria-hidden className="mr-0.5 i-ri-search-line size-4 shrink-0 text-components-input-text-placeholder" />
@@ -384,6 +396,70 @@ const AsyncDirectoryDemo = () => {
   )
 }
 
+const AsyncReviewerDemo = () => {
+  const [inputValue, setInputValue] = useState('ma')
+  const [value, setValue] = useState<Option[]>([reviewerOptions[1]!])
+  const [items, setItems] = useState(reviewerOptions.slice(0, 3))
+  const [loading, setLoading] = useState(false)
+
+  useEffect(() => {
+    setLoading(true)
+    const timeout = window.setTimeout(() => {
+      const query = inputValue.trim().toLowerCase()
+      const matches = query
+        ? reviewerOptions.filter(option => `${option.label} ${option.meta}`.toLowerCase().includes(query))
+        : reviewerOptions
+
+      setItems(matches)
+      setLoading(false)
+    }, 450)
+
+    return () => window.clearTimeout(timeout)
+  }, [inputValue])
+
+  const selectedItems = value.filter(selected => !items.some(item => item.value === selected.value))
+
+  return (
+    <FieldRoot name="asyncReviewers" className={fieldWidth}>
+      <FieldLabel>Async reviewers</FieldLabel>
+      <Combobox
+        items={[...selectedItems, ...items]}
+        multiple
+        value={value}
+        onValueChange={setValue}
+        inputValue={inputValue}
+        onInputValueChange={setInputValue}
+      >
+        <ComboboxInputGroup className="h-auto min-h-8 items-start py-1">
+          <ComboboxChips>
+            <ComboboxValue>
+              {(selectedValue: Option[]) => (
+                <>
+                  {selectedValue.map(item => (
+                    <ComboboxChip key={item.value} aria-label={item.label}>
+                      <span className="max-w-32 truncate">{item.label}</span>
+                      <ComboboxChipRemove aria-label={`Remove ${item.label}`} />
+                    </ComboboxChip>
+                  ))}
+                  <ComboboxInput placeholder={selectedValue.length ? '' : 'Search reviewers…'} className="min-w-24 px-1 py-0.5" />
+                </>
+              )}
+            </ComboboxValue>
+          </ComboboxChips>
+        </ComboboxInputGroup>
+        <ComboboxContent popupClassName="w-[420px]">
+          <ComboboxStatus className="border-b border-divider-subtle">
+            {loading ? 'Loading reviewer matches…' : `${items.length} selectable reviewers`}
+          </ComboboxStatus>
+          <ComboboxList>{renderOptionItem}</ComboboxList>
+          <ComboboxEmpty>No reviewer matches this query</ComboboxEmpty>
+        </ComboboxContent>
+      </Combobox>
+      <FieldDescription>Selected reviewers stay available while async matches change.</FieldDescription>
+    </FieldRoot>
+  )
+}
+
 const meta = {
   title: 'Base/Form/Combobox',
   component: Combobox,
@@ -403,9 +479,9 @@ type Story = StoryObj<typeof meta>
 
 export const Default: Story = {
   render: () => (
-    <div className={fieldWidth}>
-      <Combobox items={dataSourceOptions} defaultValue={defaultDataSource} autoHighlight>
-        <ComboboxLabel>Connect source</ComboboxLabel>
+    <FieldRoot name="dataSource" className={fieldWidth}>
+      <FieldLabel>Connect source</FieldLabel>
+      <Combobox items={dataSourceOptions} defaultValue={defaultDataSource}>
         <ComboboxInputGroup className="h-8 min-h-8 px-2">
           <span aria-hidden className="mr-0.5 i-ri-search-line size-4 shrink-0 text-components-input-text-placeholder" />
           <ComboboxInput placeholder="Search data sources…" className="block h-4.5 grow px-1 py-0 system-sm-regular text-components-input-text-filled" />
@@ -416,7 +492,7 @@ export const Default: Story = {
           <ComboboxList>{renderSimpleOptionItem}</ComboboxList>
         </ComboboxContent>
       </Combobox>
-    </div>
+    </FieldRoot>
   ),
 }
 
@@ -424,7 +500,7 @@ export const FormField: Story = {
   render: () => (
     <FieldRoot name="sourceConnector" className={fieldWidth}>
       <FieldLabel>Connect source</FieldLabel>
-      <Combobox items={dataSourceOptions} defaultValue={defaultDataSource} autoHighlight>
+      <Combobox items={dataSourceOptions} defaultValue={defaultDataSource}>
         <ComboboxInputGroup className="h-8 min-h-8 px-2">
           <span aria-hidden className="mr-0.5 i-ri-search-line size-4 shrink-0 text-components-input-text-placeholder" />
           <ComboboxInput placeholder="Search data sources…" className="block h-4.5 grow px-1 py-0 system-sm-regular text-components-input-text-filled" />
@@ -443,7 +519,7 @@ export const FormField: Story = {
 export const CompactTriggerWithPopupSearch: Story = {
   render: () => (
     <div className={fieldWidth}>
-      <Combobox items={dataSourceOptions} defaultValue={defaultPopupDataSource} autoHighlight>
+      <Combobox items={dataSourceOptions} defaultValue={defaultPopupDataSource}>
         <ComboboxLabel>Data source</ComboboxLabel>
         <ComboboxTrigger aria-label="Data source">
           <ComboboxValue placeholder="Choose source" />
@@ -461,22 +537,28 @@ export const AsyncSearchSingle: Story = {
   render: () => <AsyncDirectoryDemo />,
 }
 
+export const AsyncSearchMultiple: Story = {
+  render: () => <AsyncReviewerDemo />,
+}
+
 export const Sizes: Story = {
   render: () => (
     <div className="flex w-80 flex-col gap-3">
       {(['small', 'medium', 'large'] as const).map(size => (
-        <Combobox key={size} items={sizeOptions} defaultValue={defaultProvider} autoHighlight>
-          <ComboboxLabel>{`${size[0]!.toUpperCase()}${size.slice(1)}`}</ComboboxLabel>
-          <ComboboxInputGroup size={size} className="px-2">
-            <span aria-hidden className="mr-0.5 i-ri-search-line size-4 shrink-0 text-components-input-text-placeholder" />
-            <ComboboxInput size={size} placeholder="Search providers…" className="px-1" />
-            <ComboboxClear size={size} className="mr-0.5" />
-            <ComboboxInputTrigger size={size} className="mr-0" />
-          </ComboboxInputGroup>
-          <ComboboxContent>
-            <ComboboxList>{renderOptionItem}</ComboboxList>
-          </ComboboxContent>
-        </Combobox>
+        <FieldRoot key={size} name={`provider-${size}`}>
+          <FieldLabel>{`${size[0]!.toUpperCase()}${size.slice(1)}`}</FieldLabel>
+          <Combobox items={sizeOptions} defaultValue={defaultProvider}>
+            <ComboboxInputGroup size={size} className="px-2">
+              <span aria-hidden className="mr-0.5 i-ri-search-line size-4 shrink-0 text-components-input-text-placeholder" />
+              <ComboboxInput size={size} placeholder="Search providers…" className="px-1" />
+              <ComboboxClear size={size} className="mr-0.5" />
+              <ComboboxInputTrigger size={size} className="mr-0" />
+            </ComboboxInputGroup>
+            <ComboboxContent>
+              <ComboboxList>{renderOptionItem}</ComboboxList>
+            </ComboboxContent>
+          </Combobox>
+        </FieldRoot>
       ))}
     </div>
   ),
@@ -485,7 +567,7 @@ export const Sizes: Story = {
 export const Grouped: Story = {
   render: () => (
     <div className={fieldWidth}>
-      <Combobox items={toolGroups} defaultValue={defaultTool} autoHighlight>
+      <Combobox items={toolGroups} defaultValue={defaultTool}>
         <ComboboxLabel>Workflow tool</ComboboxLabel>
         <ComboboxTrigger aria-label="Workflow tool">
           <ComboboxValue placeholder="Select tool" />
@@ -505,8 +587,8 @@ const MultipleChipsDemo = () => {
   return (
     <FieldRoot name="reviewers" className={fieldWidth}>
       <FieldLabel>Reviewers</FieldLabel>
-      <Combobox items={reviewerOptions} multiple value={value} onValueChange={setValue} autoHighlight>
-        <ComboboxInputGroup className="h-auto min-h-8 items-start py-1 pr-1">
+      <Combobox items={reviewerOptions} multiple value={value} onValueChange={setValue}>
+        <ComboboxInputGroup className="h-auto min-h-8 items-start py-1">
           <ComboboxChips>
             <ComboboxValue>
               {(selectedValue: Option[]) => (
@@ -522,8 +604,6 @@ const MultipleChipsDemo = () => {
               )}
             </ComboboxValue>
           </ComboboxChips>
-          <ComboboxClear className="mt-0.5 mr-0.5" />
-          <ComboboxInputTrigger className="mt-0.5 mr-0" />
         </ComboboxInputGroup>
         <ComboboxContent>
           <ComboboxList>{renderOptionItem}</ComboboxList>
@@ -546,7 +626,7 @@ export const EmptyAndStatus: Story = {
   render: () => (
     <FieldRoot name="connector" className={fieldWidth}>
       <FieldLabel>Connector</FieldLabel>
-      <Combobox items={emptyOptions} defaultInputValue="salesforce" autoHighlight>
+      <Combobox items={emptyOptions} defaultInputValue="salesforce">
         <ComboboxInputGroup className="h-8 min-h-8 px-2">
           <span aria-hidden className="mr-0.5 i-ri-search-line size-4 shrink-0 text-components-input-text-placeholder" />
           <ComboboxInput placeholder="Search connectors…" className="block h-4.5 grow px-1 py-0 system-sm-regular text-components-input-text-filled" />
@@ -567,8 +647,8 @@ export const DisabledAndReadOnly: Story = {
   render: () => (
     <div className="flex w-80 flex-col gap-3">
       <FieldRoot name="disabledProvider" disabled>
-        <FieldLabel>Disabled provider</FieldLabel>
         <Combobox items={providerOptions} defaultValue={disabledProvider} disabled>
+          <ComboboxLabel>Disabled provider</ComboboxLabel>
           <ComboboxTrigger aria-label="Disabled model provider">
             <ComboboxValue />
           </ComboboxTrigger>
diff --git a/packages/dify-ui/src/combobox/index.tsx b/packages/dify-ui/src/combobox/index.tsx
index 33852d1a91..8f87b279ca 100644
--- a/packages/dify-ui/src/combobox/index.tsx
+++ b/packages/dify-ui/src/combobox/index.tsx
@@ -436,7 +436,7 @@ export function ComboboxEmpty({
 }: BaseCombobox.Empty.Props) {
   return (
     <BaseCombobox.Empty
-      className={cn('px-3 py-2 system-sm-regular text-text-tertiary', className)}
+      className={cn('px-3 py-2 system-sm-regular text-text-tertiary empty:h-0 empty:p-0', className)}
       {...props}
     />
   )
diff --git a/packages/dify-ui/src/select/__tests__/index.spec.tsx b/packages/dify-ui/src/select/__tests__/index.spec.tsx
index 09450f56af..d1a89243b6 100644
--- a/packages/dify-ui/src/select/__tests__/index.spec.tsx
+++ b/packages/dify-ui/src/select/__tests__/index.spec.tsx
@@ -173,7 +173,7 @@ describe('Select wrappers', () => {
       })
 
       await expect.element(screen.getByRole('combobox', { name: 'city select' })).toHaveAttribute('data-readonly')
-      expect(screen.getByRole('combobox', { name: 'city select' }).element().className).toContain('data-readonly:bg-transparent')
+      expect(screen.getByRole('combobox', { name: 'city select' }).element().className).toContain('data-readonly:bg-components-input-bg-normal')
     })
 
     it('should hide arrow icon via CSS when Root is readOnly', async () => {
@@ -319,6 +319,41 @@ describe('Select wrappers', () => {
       await expect.element(screen.getByRole('option', { name: 'New York' })).toBeInTheDocument()
     })
 
+    it('should navigate items with arrow keys', async () => {
+      const screen = await render(
+        <Select defaultValue="seattle">
+          <SelectTrigger aria-label="city select">
+            <SelectValue />
+          </SelectTrigger>
+          <SelectContent listProps={{ 'role': 'listbox', 'aria-label': 'select list' }}>
+            <SelectItem value="seattle">
+              <SelectItemText>Seattle</SelectItemText>
+              <SelectItemIndicator />
+            </SelectItem>
+            <SelectItem value="new-york">
+              <SelectItemText>New York</SelectItemText>
+              <SelectItemIndicator />
+            </SelectItem>
+            <SelectItem value="tokyo">
+              <SelectItemText>Tokyo</SelectItemText>
+              <SelectItemIndicator />
+            </SelectItem>
+          </SelectContent>
+        </Select>,
+      )
+
+      const trigger = asHTMLElement(screen.getByRole('combobox', { name: 'city select' }).element())
+
+      trigger.focus()
+      trigger.dispatchEvent(new KeyboardEvent('keydown', { key: 'ArrowDown', bubbles: true, cancelable: true }))
+      await expect.element(screen.getByRole('option', { name: 'Seattle' })).toHaveAttribute('data-highlighted')
+
+      const highlightedItem = asHTMLElement(screen.getByRole('option', { name: 'Seattle' }).element())
+      highlightedItem.dispatchEvent(new KeyboardEvent('keydown', { key: 'ArrowDown', bubbles: true, cancelable: true }))
+
+      await expect.element(screen.getByRole('option', { name: 'New York' })).toHaveAttribute('data-highlighted')
+    })
+
     it('should not call onValueChange when disabled item is clicked', async () => {
       const onValueChange = vi.fn()
 
diff --git a/packages/dify-ui/src/select/index.stories.tsx b/packages/dify-ui/src/select/index.stories.tsx
index 40461be199..62abb0048d 100644
--- a/packages/dify-ui/src/select/index.stories.tsx
+++ b/packages/dify-ui/src/select/index.stories.tsx
@@ -16,6 +16,11 @@ import {
 
 const triggerWidth = 'w-64'
 
+const cityItems = [
+  { label: 'Seattle', value: 'seattle' },
+  { label: 'New York', value: 'new-york' },
+]
+
 const meta = {
   title: 'Base/Form/Select',
   component: Select,
@@ -238,7 +243,7 @@ export const Disabled: Story = {
 export const ReadOnly: Story = {
   render: () => (
     <div className={triggerWidth}>
-      <Select defaultValue="seattle" readOnly>
+      <Select defaultValue="seattle" items={cityItems} readOnly>
         <SelectTrigger aria-label="City">
           <SelectValue />
         </SelectTrigger>
diff --git a/packages/dify-ui/src/select/index.tsx b/packages/dify-ui/src/select/index.tsx
index c16d72af98..ddfd7cf758 100644
--- a/packages/dify-ui/src/select/index.tsx
+++ b/packages/dify-ui/src/select/index.tsx
@@ -26,7 +26,7 @@ const selectTriggerVariants = cva(
     'hover:bg-state-base-hover-alt focus-visible:bg-state-base-hover-alt data-popup-open:bg-state-base-hover-alt',
     'focus-visible:ring-1 focus-visible:ring-components-input-border-active focus-visible:ring-inset',
     'data-placeholder:text-components-input-text-placeholder',
-    'data-readonly:cursor-default data-readonly:bg-transparent data-readonly:hover:bg-transparent',
+    'data-readonly:cursor-default data-readonly:bg-components-input-bg-normal data-readonly:hover:bg-components-input-bg-normal',
     'data-disabled:cursor-not-allowed data-disabled:bg-components-input-bg-disabled data-disabled:text-components-input-text-filled-disabled data-disabled:hover:bg-components-input-bg-disabled',
     'data-disabled:data-placeholder:text-components-input-text-disabled',
   ],
diff --git a/web/app/components/base/chip/index.tsx b/web/app/components/base/chip/index.tsx
index d009159f44..5abf8a17bb 100644
--- a/web/app/components/base/chip/index.tsx
+++ b/web/app/components/base/chip/index.tsx
@@ -104,7 +104,7 @@ function Chip<T extends ItemValue>({
             <SelectItem
               key={item.value}
               value={item.value}
-              className="mx-1 gap-2 rounded-lg px-2 py-[6px] pl-3 select-none"
+              className="mx-1 gap-2 rounded-lg px-2 py-1.5 pl-3 select-none"
             >
               <SelectItemText className="mr-0 px-0">
                 <span title={item.name} className="block truncate system-sm-medium text-text-secondary">{item.name}</span>