Since the 1.16.1 Update my minecraft realm will reset overnight. I've logged in/out to test if it is saving, and in an evening it will be consistent, but in the morning I will have lost hours of game play. I've noticed that it most commonly happens when I am playing after 9pm Mountain time (Denver) but it has occurred multiple times on my realm.
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duplicates
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[Mod] markderickson
migrated
Hi there!
Realms seems to be having tons of issues after 1.16 has released. This bug is a duplicate of REALMS-4218.
Make sure to do a quick search for your bug before posting it, and then vote for it, comment on it, and follow it. This is the best way for it to be prioritized by Mojang. Making a duplicate post means more work for the volunteers who help out to moderate and clean things up for the developers to look at and fix what needs to be fixed.
Also, this is a Realms-specific issue. For better results and for people who understand Realms better to see your issue, in the future, please post bugs specifically for Realms in the Realms project.