Music tagging in Plex is still (in best cases) weird

I agree with Tom, pictures are easy for you, but not necessarily for others. Although I finally figured it out – Plex has split this album into two, one with a single track (track 11), and the other with the rest. It’s most likely a “garbage in, garbage out” issue. I’ve seen this happen when the Album Artist tag isn’t populated, even if it’s the same as the Track Artist.

[HowTo] Configure Plex to use embedded metadata (music)