Hello @AZNickelos - this bug has been particularly difficult to track down the cause of. I want to stress that your saves are intact though, and that this bug only relates to displaying data. Once addressed, you should be able to see them all again. I had a few additional questions for you surrounding this:
- Does logging out of & back into your Xbox account fix the issue?
- Have all your saves vanished, or only some of them?
- If they all disappeared, do you remember what year your most recent world was made in?
- If only some disappeared, could you tell me which years your remaining worlds were made in?
- Did you originally start playing Terraria on the Xbox 360 before switching to your Xbox One (and, later, the Series S)?