When the same album is accessed via Plex in any way (search, Tidal related tracks, add-to-library, and via Plex or Plexamp for Android or via Plex Web) it appears with only the first 5 tracks. It also appears with incorrect album data (relating to the King Crimson album of the same name).
Thanks - I saw those, but they look related to licensing issues that aren’t being navigated well by the Tidal partner program.
This issue looks more like a data matching error since the album Plex is incorrectly matching has only five tracks so I think it is just discarding the others that Tidal has available. I have not found any way to tell Plex it has got it wrong!