diff --git a/web/app/components/workflow-app/hooks/use-workflow-run.ts b/web/app/components/workflow-app/hooks/use-workflow-run.ts
index 10155f6128..a5e2740d8c 100644
--- a/web/app/components/workflow-app/hooks/use-workflow-run.ts
+++ b/web/app/components/workflow-app/hooks/use-workflow-run.ts
@@ -341,6 +341,7 @@ export const useWorkflowRun = () => {
 
     featuresStore?.setState({ features: mappedFeatures })
     workflowStore.getState().setEnvironmentVariables(publishedWorkflow.environment_variables || [])
+    workflowStore.getState().setConversationVariables(publishedWorkflow.conversation_variables || [])
   }, [featuresStore, handleUpdateWorkflowCanvas, workflowStore])
 
   return {
diff --git a/web/app/components/workflow/panel/env-panel/variable-modal.tsx b/web/app/components/workflow/panel/env-panel/variable-modal.tsx
index 1c780f7341..47e56397f3 100644
--- a/web/app/components/workflow/panel/env-panel/variable-modal.tsx
+++ b/web/app/components/workflow/panel/env-panel/variable-modal.tsx
@@ -62,6 +62,8 @@ const VariableModal = ({
     // Original check for create new variable
     if (!env && envList.some(e => e.name === name))
       return notify({ type: 'error', message: 'name is existed' })
+    if (description.length > 256)
+      return notify({ type: 'error', message: 'description can not be longer than 256 characters' })
 
     onSave({
       id: env ? env.id : uuid4(),