This happened to my nephew and I today too! 15/08/2022 I made sure to check and both my switch and the game are up to date.
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Reply from @unknown:
This bug is about junk data in the world save files. It’s not something you could see in-game except indirectly by comparing world save sizes shown in the world list before and after the update. I have deleted your screenshot because it is unrelated to this report. Please look for another report that describes your issue.
KaptainKryptid
This happened to my nephew and I today too! 15/08/2022 I made sure to check and both my switch and the game are up to date.
[media]Reply from @unknown:
This bug is about junk data in the world save files. It’s not something you could see in-game except indirectly by comparing world save sizes shown in the world list before and after the update. I have deleted your screenshot because it is unrelated to this report. Please look for another report that describes your issue.