I have a potentially dumb question, but honestly I've run out of ideas. I'm running a family nextcloud instance where me and my wife are managing our things, in our own boards. She noticed that cards that she put in her "Done" stack in a board of hers, are deleted after about a year. I have to emphasize:

• She does not delete the cards (they hold important information, even though they are Done)
• She does not even archive them

All she does is she moves them to a stack. First off, this is a problem, as she's losing information (I'm now restoring old database backups to get back old Deck cards, not a fun activity in itself). But second, this bugs the hell out of me: is there any functionality that would do this in Nextcloud? Some hidden setting? I'm even thinking possible user error, but she's quite tech savvy and I believe her when she says she does not do this knowingly...

Also important to highlight that I have cards from 2 years ago in my boards that are just fine, no deletion, nothing. And nothing in the logs, althgough I don't even know what I'm looking for, because we aren't sure when the deletion happened.

Any idea/pointer would be highly appreciated.