I also have this issue, roon hides the local versions when I add a version of the same album from Tidal.
Roon also shows the Tidal symbol and selects the Tidal version of albums in some cases even though I have a local version, and haven’t added the the tidal version of the album to the library. I tried adding the tidal version of one of these albums, then Roon stopped even showing the local version of the album.
Both these issues are extremely annoying, and should be fixed ASAP.