diff --git a/packages/block-editor/src/components/block-toolbar/utils.js b/packages/block-editor/src/components/block-toolbar/utils.js
index 7f7accf7c8784..da64ca0bfb348 100644
--- a/packages/block-editor/src/components/block-toolbar/utils.js
+++ b/packages/block-editor/src/components/block-toolbar/utils.js
@@ -59,6 +59,8 @@ export function useDebouncedShowMovers( {
 		[ isFocused ]
 	);
 
+	useEffect( () => () => clearTimeout( timeoutRef.current ), [] );
+
 	return {
 		showMovers,
 		debouncedShowMovers,