Then we need to clarify more precisely what technology is in use so that troubleshooting with the community is possible. Roon has a support form for that, so nothing is forgotten that could be important. If I can find it quickly I’ll attach it.
Roon Core Machine
Networking Gear & Setup Details
Connected Audio Devices
Number of Tracks in Library
Description of Issue
These questions come automatically when the thread is opened under support. I try to file it there.
I think you may have been affected by a known problem with the Roon-Qobuz integration. This has been reported by several users. Albums or whole libraries disappear and reappear as by magic… So be prepared to find any day that your library or part of your library is missing again. Good news is that you can’t do anything about it… it will eventually be back.
Just saw this recent thread and answer by Roon support: