When clicking "Done", the realtime editor sometimes asks if the user wants to leave the page

Steps to reproduce:

1. Open the realtime editor.
2. Perform some edits (optional)
3. Click "Done".

Expected result:

When clicking done, no alert asking if I want to leave the page is displayed.

Actual result:

In some (rare) cases, an alert asking if I want to leave the page is displayed. This seems to be race condition that seems to also reproduce on CI sometimes but I also got this on local demo instances.