I don't use Roon, but do have a Qobuz subscription. I use "Favorites" a lot and have only ever "lost" two albums. One was Mark Knopler "Privateering" which is now limited to 30 second tracks after originally being fully available. That's a copyright issue with the album label.
The other was Patricia O'Callaghan's album "Real Emotional Girl" which had originally been miscategorized. My favorite disappeared when they corrected the metadata, but I simply had to relocate the album and add the corrected version back to my Favorites.
So, stuff like that does happen, but I have a hard time believing that either happened to 7,000 albums. Sounds like something else is going on and Roon quit talking to Qobuz or vice versa.
Did you go into your play.qobuz.com account directly (using your laptop or desktop) and see if those files are still highlighted for your account, either in Favorites or My Playlists?
The other was Patricia O'Callaghan's album "Real Emotional Girl" which had originally been miscategorized. My favorite disappeared when they corrected the metadata, but I simply had to relocate the album and add the corrected version back to my Favorites.
So, stuff like that does happen, but I have a hard time believing that either happened to 7,000 albums. Sounds like something else is going on and Roon quit talking to Qobuz or vice versa.
Did you go into your play.qobuz.com account directly (using your laptop or desktop) and see if those files are still highlighted for your account, either in Favorites or My Playlists?