If you add an album from Tidal into your library Plexamp on MacOS won’t load any additional artist matches from Tidal anymore (Tidal Albums, Plex Recommendations on Tidal) Removing the album makes no difference, neither does restarting the app. It also doesn’t seem to matter which app adds the album either. This doesn’t seem to affect Plexamp on the iPhone or the regular Plex apps.
Plexamp 3.1.1