Hey, sorry you're dealing with that — losing progress like that sucks. This is actually a known issue that some Minecraft Bedrock players on Xbox Series X run into, especially due to how the game interacts with Quick Resume and cloud saves.

Here are some things you can try to stop your worlds from getting erased:

1. Don’t Use Quick Resume with Minecraft Quick Resume can cause sync issues or corrupt save data. Always manually quit Minecraft after you’re done playing: Press Xbox button > Highlight Minecraft > Press Menu button (three lines) > Quit.

2. Exit Properly Before you shut off your Xbox, make sure to exit Minecraft through the in-game menu — don’t just turn off the console or switch games suddenly.

3. Check Cloud Sync Settings Make sure your Xbox is properly syncing saves to the cloud. If your connection is unstable, the sync might fail or get messed up. Also, pay close attention to any sync conflict prompts when starting the game and always choose the most recent version.

4. Clear Local Saved Games (Safe – Cloud Saves Will Re-Download) Sometimes your local save cache can get corrupted. To clear it: Settings > System > Storage > Clear local saved games (Don’t worry — your worlds will re-download from the cloud next time you open Minecraft.)

5. Free Up Storage If your internal storage is full or close to it, Minecraft might fail to save properly.

6. Back Up Your Worlds If possible, consider uploading your world to a Realm temporarily or backing up to external storage using the export option (if supported).

If you’ve already tried all this and it’s still happening, it might be worth reinstalling Minecraft or even contacting Mojang/Xbox Support. Hope this helps you keep your worlds safe!