diff --git a/web/app/components/base/prompt-editor/hooks.ts b/web/app/components/base/prompt-editor/hooks.ts
index 4e9e95529f..79fe07f0c2 100644
--- a/web/app/components/base/prompt-editor/hooks.ts
+++ b/web/app/components/base/prompt-editor/hooks.ts
@@ -158,9 +158,9 @@ export function useBasicTypeaheadTriggerMatch(
 ): TriggerFn {
   return useCallback(
     (text: string) => {
-      const validChars = `[^${trigger}${PUNCTUATION}\\s]`
+      const validChars = `[${PUNCTUATION}\\s]`
       const TypeaheadTriggerRegex = new RegExp(
-        `([^${trigger}]|^)(`
+        '(.*)('
           + `[${trigger}]`
           + `((?:${validChars}){0,${maxLength}})`
           + ')$',