After update 1.16.210 was released once loaded into realm I noticed I was all the way back at world spawn, thought perhaps someone had destroyed my bed but I had no items on me. Once I made it back to my base my end chest was completely empty too. Logged out. Logged back in and same issue - all the way back at spawn again.

Terrified to make any progress since it'll all be gone next time I log in.

I am not the host of the realm but all other players have retained their user data.