diff --git a/x-pack/legacy/plugins/canvas/public/application.tsx b/x-pack/legacy/plugins/canvas/public/application.tsx
index 79b3918fef99b..f75b3b427c41b 100644
--- a/x-pack/legacy/plugins/canvas/public/application.tsx
+++ b/x-pack/legacy/plugins/canvas/public/application.tsx
@@ -104,8 +104,9 @@ export const initializeCanvas = async (
         href: getDocumentationLinks().canvas,
       },
     ],
-    content: domNode => () => {
+    content: domNode => {
       ReactDOM.render(<HelpMenu />, domNode);
+      return () => ReactDOM.unmountComponentAtNode(domNode);
     },
   });