Yeah.... I don't have a stack trace for this. It happens every time my server reboots or crashes though.

Can confirm my server has not been retaining trusted players upon reboot either, as of 1.21.6

Hmm mines been fine and I have had had hundreds of restart.

I haven't had a chance to look into it yet, as I currently have influenza, however, could it possibly have something to do with Geyser? I myself have been running a cross-play Java/Bedrock server, and everything everything functioned as expected before 1.21.6

I can confirm this issue occurs without Geyser. I've set up my server to restart every 24 hours, and this bug has become a very annoying issue for players who want to share bases.