I’ve noticed this on and off over the last few months. It’s particularly an issue after several hours of development work.
The bubble editor glitches and thinks there is an endless loop of new edits causing the page testing to show the “warning to refresh page” and stopping me from testing anything on the page.
I’ve confirmed that no other users are working in the branch. I’ve also waited several minutes for the branch to “catch up” with the bubble servers and tried refreshing pages testing pages.
The fix is to refresh the editor page. This seems to break the loop of sending bubble servers a “page is updated”.