As a side note: I’ve had similar issue once, but found the reason. I’ve had 2 editor windows opened, for two apps, which shared the same database. I was modifying DB in the 1st editor window (adding new collection, records, etc.). And then I did something in the 2nd editor window - and later discovered that all changes has been lost (probably for the reason that 2nd window over-wrote the changes).
So just in case - I’d advice to have only one editor window opened.
hmm this might be also the cause since I am also working on a multiple tabs , probably adalo should have a feature soon that it can detect if the app is open on another browser, although the versioning will definitely fix this similar with the appsheet
Having 2+ editor windows for same app may result in unexpected behaviour, unfortunately.
There is a request for versioning here: Web App Publishing | Voters | Adalo
You may want to upvote it, so that it gains some more priority and that you’ll be notified when this feature is available.