I noticed recently that Flow started showing “Various Artists” for quite a few songs it was playing. I don’t recall this always being the case.
The issue here is that Flow will play tracks from compilation albums, where the album is composed of tracks by, well… various artists. However, each individual track does have an attributed artist.
Looking at the album play queue page, perhaps this is showing incorrectly as well - I’d expect it to just show the track artist under a track.
I’ve added the bug tag as this seems to be a recent-ish change and to me looks like a bug, but feel free to remove the tag if it is in fact working as intended.
