Hello, I with some other users have the same problems and there are other threads about it
For example https://community.roonlabs.com/t/tidal-issue/8169/6, All Tidal Albums disappeared from roon library
The support team says that they have found and fixed the issue but we have to wait unti 1.2 release.
In the meanwhile we could see our tidal albums come and go from our library…
Bye Andrea