Words disappearing when playing offline on Xbox one

I played Minecraft offline on my Xbox yesterday, saved and quit the game, and when I returned to "my worlds" screen, the world was missing. I attempted to create a new world, played for a bit, but when I exited that one, it was missing from the world list as well. I power restarted my Xbox, but the world's are still gone. I have no access to wifi, so I can't try and sync or reinstall the game.