Realms slot resets world by itself

No way to reproduce.

This is 2nd time this month my Realm has reset itself to a brand world.  
1st time Oct 9th 2022
2nd time today Oct 28th 2022

I do not play on it much, but my discord members do and all I know is I get a ping asking me if I reset the world or something.

I also noticed size fluctuations from 1400 to 2200 MB.  No idea if related.

I have the backup page image from the 1st time saved off too, if needed.