Since the relase of multipage app as the default we have notices major problems with losing changes made. We are extremly carefull to always refresh the page before starting the work and that never 2 developers are working on the same project at the same time. (https://goolets.retool.com/)
Even with that in the last 3 days we have lost ca. 20 hours of work.
Are there any other things that could be done to resolve this problems?
I'm facing the same issue, but I have a solution for you. Instead of directly clicking the "Close Tab" button, try using the "Back to Home" button. If you lose your work, check the "History" tab to see if it was saved, then restore it.