This happened to me but with different circumstances. So i was playing with my buddy on a world i put a lot of work into, and all of a sudden the game crashed. I'm on the nintendo switch edition and so i boot up the level and it got stuck at 99%. Except that while im stuck on the loading screen, my buddy tried to join and was able to get in and move around. Why is that, it cant be corrupted because he joined in and played.
Same here, except mine is kind of funny since i cant use my party pack 2 skins and it says that it costs 10000000 coins! XD