Missing albums (lots). Not in library but do show in Music > Files

Everything was fine until I upgraded from Isengard to Jarvis. Lots of albums missing, and I find nothing in the logs.
I have upgraded to Jarvis and noticed right away that a lot of albums were missing, so I upgraded to Krypton and I’m still having the same problem.
I always start from scratch with a clean userdata. I always use the same artist as a reference, and it’s always the same albums that are missing from version to version. I’ve check a few other artists and most of them have albums missings. I have consistent tags, everything is tagged the same. I don’t know what to do.

They don’t show in library, but I do see them when I go to Music > Files and browse from there.