Yesterday I was randomly added to beta when I didn't select join beta on google play. I knew it was an easy fix so I just uninstalled Minecraft and reinstalled it after selecting leave beta. My worlds seemed to be back to normal, but I tried opening my main survival world and it said that a newer version of the game ran it so now I can't connect to the world. I had just gotten full netherite and I had an awesome house. I'm really disappointed that this happened even though I didn't even want to join the beta program. I might try copying the world, but if it doesn't work, I'll be pretty bummed.