After trying to load a shared world savegame (which I am the owner), a new game was started instead and when I quit that game and tried to reload the shared world, it was gone. Am I the only one with that issue? 

Had the same issue, never happened before for me

Eu também estou com o mesmo problema. O meu jogo compartilhado on-line que vai mostrar que vai aparecer e fechar o jogo, ou apenas abrir o mundo e abrir o mundo. Isso é horrível, corrijam o mais rápido possível por favor?

Same thing happened to me. It’s gone now and can’t find it. I then started a new shared world and got like 4 hours of progress then tried to save and all I got was processing then nothing. And now all that progress is gone too. What is this and how do I fix it and get my saved back?!?!

Same thing is happening to me ! I’m playing on Xbox Series S on a shared account. Although I’m not the owner of the game I can still play freely and have better weapons than anyone else in the shared game. Now it’s gone and I don’t see anything on my game saves. 

This happened to us... our main host who started the game closed and reloaded the game I think 20ish times untill the save file finally appeared....he then stsrtrf the gsme and then his whole gsme crashed..... fibslly afger closing and opening a few more times it appeared he then downloaded a hard copy of the multiplayer save file to his pc which I think we will do from now on after this fiasco.