Game Crashes When Loading Existing Worlds After Update [iOS/Bedrock] - Worlds Only Load Once Then Crash

After updating Minecraft Bedrock to the latest version on my iPad, all my existing worlds have become unplayable. When I try to load any world that was saved before the update, the game crashes during the loading process.

Steps to Reproduce:

1. Update Minecraft Bedrock to latest version on iPad

2. Try to load an existing world that was created before the update

3. Game crashes during world loading

4. If I load an older backup copy of the same world, it loads successfully the FIRST time only

5. After saving and exiting that world, any subsequent loading attempts cause immediate crashes

Expected Behavior:
Worlds should load normally and remain accessible after saving, as they did before the update.

Actual Behavior:

• Pre-update worlds crash on loading

• Older backup copies load once successfully, but crash on all subsequent loading attempts after being saved

• Only worlds created AFTER the update work properly

• The issue affects multiple different worlds and their backups

System Information:

• Device: iPad [insert your model]

• iOS Version: [insert your current iOS version]

• Minecraft Version: Latest Bedrock version (after update)

• World Storage: Local device storage

Additional Information:

• I've already tried: clearing cache, restarting iPad, updating iOS, deleting/reinstalling Minecraft

• The problem started immediately after the Minecraft update

• Freshly created worlds work without issues

• All affected worlds have modification dates from before the update

• The worlds become "corrupted" after the first successful load and save in the new version