Hey,
I’ve had the same issue before. Even if everything looks correctly tagged, Apple Music can be picky. Most of the time it came from a tiny difference in the tags or the format of the files. What helped me was re-saving the album tags or checking the ‘album artist’ field again. After that, Apple Music grouped everything correctly. Might be worth trying.

This usually happens if there’s a slight difference in metadata, even if it looks identical. Try selecting all tracks in the album and re-entering the album artist manually.

hi
it seems like duplicate or inconsistent meta tags causing this issue..make sure they are consistent across all the tracks within titled album.

It seems, when aborting sync iOS messed up database.
Rewriting tags or delete from phone and new sync should solve it.

Hi,
I got a little problem. When syncing from MediaMonkey to IPhone, some albums are shown as two or more albums in Apple music. I don’t think it’s a mess by the monkey, that’s why I set it off topic. All is tagged correctly same artist, album artist, album, date tag etc. Does anyone know how to fix it?