If the filter is set on Album Artist, the album appears in full under Relaxing Chansons, and not at all under Céline Dion nor Death Grips.
If the filter is set on Artist, 6 tracks of the album appear under Céline Dion, 6 tracks under Death Grips, and no entry exists for Relaxing Chansons.
I feel you are doing things in a contorted way.
As others mentioned also, MusicBee is not a 'folder player'. You want to use it as such, but you also seem to expect results as if your music is properly tagged, which it seems it isn't.
MusicBee also won't behave as the Linux player you mention. Which even isn't a stand-alone player/manager, but a front-end interface for another piece of software.
You came with an example of an imaginary album that has two album artists.
The principle of an album is that it has a singular name or description for the 'album artist'.
Your imaginary example should have something like 'Celine Dion · Death Grips' as album artist.
Or 'Various Artists', or whatever.
If you would tag your music properly, and use MusicBee as how it is intended, you could have:
- an Album Artist tag: Celine Dion · Death Grips
- an Album Artists tag: Celine Dion; Death Grips
Surely you can do things however you like, and take this information anyway you like it, but I thought it was good to mention this.
Other users may stumble upon this thread and perhaps get wrong ideas.