In order for Plex to follow your embedded meta tags, you need to enable “prefer local metadata” in the properties of the library.
But if you do that, you will have to adhere to these rules:
- each album can have only one album artist, i.e. all tracks of a certain album need to have the same album artist
- the folder hierarchy is
/Music/Album Artist/Album Title, which means that you cannot store albums with differing album artists inside the sameAlbum Artistfolder.
Conflicts resulting from not adhering to the above usually require a Plex dance “light” to resolve.