So I for some reason uninstalled Minecraft from my Xbox and when I re-installed it I had to download all my worlds, which wasn’t an issue. But this one world that I’ve had for over 3 years was not downloading and whenever I tried to it said “failed to sync world data” it said this every single time I attempted to load or edit this world and after a while it crashes my game and when I load back up the world is gone. But when I uninstall and reinstall the world comes back and still has the same issue. I have multiple backups of this world and it happens on all of them. Also this world was not corrupted and it was saved properly last time I played it.

Also… I just checked and when the world “disappears” it just goes to the bottom of all my worlds list and is named some random code with the date 12/31/69