diff --git a/memento-note/components/rich-text-editor.tsx b/memento-note/components/rich-text-editor.tsx
index 735e01a..3046925 100644
--- a/memento-note/components/rich-text-editor.tsx
+++ b/memento-note/components/rich-text-editor.tsx
@@ -333,6 +333,8 @@ function SlashCommandMenu({ editor, onInsertImage }: { editor: Editor; onInsertI
   const [aiLoading, setAiLoading] = useState(false)
   const menuRef = useRef<HTMLDivElement>(null)
   const selectedItemRef = useRef<HTMLButtonElement>(null)
+  // Flag: true while user is interacting with the menu (prevents selectionUpdate from closing it)
+  const menuInteracting = useRef(false)
 
   // Translated category names (keys match slashCommands category field)
   const CAT_LABELS: Record<string, string> = {
@@ -457,7 +459,9 @@ function SlashCommandMenu({ editor, onInsertImage }: { editor: Editor; onInsertI
 
   useEffect(() => {
     const handler = () => {
-      const { from, to, empty } = editor.state.selection
+      // Ignore events fired while user clicks inside the menu
+      if (menuInteracting.current) return
+      const { from, empty } = editor.state.selection
       if (!empty) { if (isOpen) closeMenu(); return }
       const text = editor.state.doc.textBetween(Math.max(0, from - 50), from, '\n')
       const m = text.match(/\/([^\s/]*)$/)
@@ -475,7 +479,17 @@ function SlashCommandMenu({ editor, onInsertImage }: { editor: Editor; onInsertI
   const totalVisible = Object.keys(categories).length
 
   return (
-    <div ref={menuRef} className="notion-slash-menu" style={{ top: coords.top, left: coords.left }} onClick={(e) => e.stopPropagation()}>
+    <div
+      ref={menuRef}
+      className="notion-slash-menu"
+      style={{ top: coords.top, left: coords.left }}
+      onMouseDown={() => {
+        // Block selectionUpdate handler while interacting with menu
+        menuInteracting.current = true
+        setTimeout(() => { menuInteracting.current = false }, 200)
+      }}
+      onClick={(e) => e.stopPropagation()}
+    >
       {/* Category tabs */}
       {!query && totalVisible > 1 && (
         <div className="notion-slash-tabs" onMouseDown={(e) => e.preventDefault()}>