The issue could be because of roblox, though I doubt it since nobody else has reported this issue as of recent.
I’d advise saving it as a file to your computer every time you finish updating the game as a safety net, but I’ll offer some more possibilities as to what’s happening.
Go to your studio settings and ensure you have auto-recovery turned on and a file path to where those auto-recovery files save, ensure it’s enabled, and you can also freely change the interval of auto-saves.
Disable Team Create; you don’t need team create on if it’s just you working on something, and saving and publishing the game is 2 clicks away. I can’t remember correctly but I’ve faced a similar issue of things not updating after leaving when I had Team Create on.