Wrong album artist assigned to new albums when the ID3 tag musicbrainz_albumartistid is set

Steps to reproduce

1. I tested this on an name-your-price (i.e. free for testing) Album available at https://mrbill.bandcamp.com/album/the-collaborative-endeavors (MP3 V0) but the issue likely can be reproduced for other songs/albums
2. If your Funkwhale instance already contains any of the songs of the album, delete them from the instance
3. Open track 14 (Quixotically Speaking) in the ID3 tag editor of your choice (I used picard):
   • Add the musicbrainz_albumartistid tag and set it to 2219ec0e-814e-4117-b1fb-1857bb4d3d25 (refers to Mr. Bill)
   • Change the artist tag from "Mr. Bill" to Mr. Bill & Ill-Esha
   • Observe that the albumartist tag is already set to Mr. Bill
4. Upload the modified MP3 to your funkwhale instance
5. Open the new album entry in Funkwhale's album browser

What happens?

The wrong album artist is assigned to the album entry: The album page says "Album containing 1 track, by Mr. Bill & Ill-Esha"

(In broader context, what happens if you upload all songs of the album in a very specific way, sometimes two entries of the same album but for different album artists will be created.)

What is expected?

The album page should say "Album containing 1 track, by Mr. Bill", as indicated by the albumartist ID3 tag.

Context

Funkwhale version(s) affected: latest

My Funkwhale instance is based on the all-in-one docker image. I tested both 0.20.1 and the latest develop tag at the time of writing.