Hipposgrumm
Comments
I can't express this enough. MAKE FREQUENT BACKUPS!!!
Is this a Bedrock Edition bug too?
This is a bedrock edition issue.
You can use an NBT editor to change the version that the world was last opened in. But beware of bugs that can come out of downgrading. Also, try checking your Google account for a compromised password. If you didn't sign up for the beta program, somebody might have gotten ahold of your account.
I can confirm for Windows 10. I can't join servers unless it's the first thing I do upon starting Minecraft. Restarting the game fixes the problem.
Now I'm starting to think that side glow frames aren't dark, floor ones are too bright.
Do you have doMobLoot turned on?
This is an issue that has probably already been reported on the bedrock edition tracker where it belongs.