Recently started using the Realm with the 1.21.1 update and noticed two times now when I've been disconnected from the Realm and when I logged back on it back rolled me an hour at least each time. On one occasion I've noticed an item duplicated while another few items vanished, I think the vanishing items is because perhaps the game thought I never picked them up so they de-spawned when in reality I did but the back roll undid this somehow.
Thank you for your report!
We're tracking this issue in https://report.bugs.mojang.com/servicedesk/customer/portal/2/REALMS-12270 , so this ticket is being resolved and linked as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
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