I followed the guides for setting up a Music Library. Tagged the music files with MusicBrainz PIcard. For some reason, the files from the 4 Non Blondes – Bigger, Faster, … show up as “[Missing]” in the Artist list for the stock Windows skin and the Chorus2 web interface. The string “4 Non Blondes” are attached to these tags: Artist, Album Artist, Album Artist Sort Order, albumartists, Artist Sort Order, Artists, in the FLAC files. If I remove the “MusicBrainz Artist Id” (efef848b-63e4-4323-8ef7-69a48fbdd51d), and “MusicBrainz Release Artist Id” (efef848b-63e4-4323-8ef7-69a48fbdd51d) tags and rescan the library, then Kodi displays the Artist name correctly. This was repeatable. Picard was used to tag the files again and after another library scan, it is back to displaying “[Missing]” for Artist.
I don’t know if this is a Kodi issue or a MusicBrainz issue. The Id tagged in the files link to the correct artist entry using the MusicBrainz website, https://musicbrainz.org/artist/efef848b-…a48fbdd51d It’s beyond my ability to try and see what comes back via an API call.