Incorrect artist art coming by default

We are coming up on a month now since I successfully uploaded an artist thumb to the Belly page of fanart.tv. I just did the Plex Dance again, and the default image continues to be the rapper, not the band.

Another thought occurred: I know musicbrainz.org contains links to other sources of data, but I don’t see fanart.tv listed on the Belly page (or any others on some spot-checking). How does Plex distinguish between the two fanart.tv pages - the one for the rapper and the one for the band? Each has their own listing on the site, and the one for Belly the rapper does not contain an artist thumb - which according to the logic we’ve sketched out above, would default the image search to last.fm, and the indistinguishable listings for the two acts. Would adding the fanart.tv link to the musicbrainz.org page cause Plex to use that link to check for art? Or is this coded somewhere else in its internal logic?

I will add the link to musicbrainz just to see and report back, but curious if anyone has better awareness of how this is determined.