Yes, so the reversions for windows 11 are definitely a bit wonky. You can try using sfc /scannow in CMD to try and look for issues.
Based on my experience, which admittedly isn’t a lot. People tend to gravitate toward re-installation, because even with a reset it can persist.
This may just be one-drive:
To interact with one drives settings you can right click the app in the bottom right of your screen, settings and in that tab you should have both syncing under account and the backup. You can manage backups from there, potentially disabling them.
Hope that works!