I believe this situation has regressed over time (cannot recall last time I looked at this view). Movies and TV Shows all are fine. I spend lots of hours a couple of years ago filling in missing Music art.
this will most likely be in the file properties, i had a song do this and it turned out that one song had “Various Artists” in it’s properties. Once I edited it it was all good.
In Windows navigate to the song right click and check the details under properties.
My rogue song had Various Artists in Album Artist and none of the other songs on that album had that.
I checked 3 random folders (including the two ZZ TOP) and I see Contributing Artists w/ the artists name and Album Artist as null. I copy in Album Artists and see how it goes. If that works, then will have to find someway to fix that across the whole MUSIC folder.
tried changing media Assets to Last.FM, did a plex dance… looks different, not better. Sometimes I can go in individually and try to do a match and there could be a hit - if it’s on last.fm, that works. If its one Personal Media Assets, that usually fails.
If you are using the file folder structure, you cannot have ANY embedded metadata in your files. Please make sure to remove them before adding them to Plex, or you’ll need to Plex Dance the files after removing the data.
I ended up changing agents, order and doing a Dance - that actually failed to remove the indicators from Plex, I actually had to go back and add in an empty /MUSIC folder and let PLEX scan that in order to clear the Library.
I then re-added content and rescanned. There was some improvement. I then went in and did individual MATCHes that worked about 60% of the time. Of that 40%, half went unresolved when PLEX agent could not come up with a match, the other half, Plex did come up with a match, but did NOT actually update the Artist icon.
I don’t usually use embedded metadata, but possibly some of the tools I use might have added some, will check some of the problem cases to see if there’s any correlation.
One good practice I have discovered that works perfectly for me is to tag files with Picard from MusicBrainz first, if MusicBrainz can match and tag the files, Plex will do the same, if it cannot, then I make updates/edits to MusicBrainz DB first before uploading into Plex. I make sure that use of local metadata is disabled in Plex and let Plex handle it all with appropriate folder structure and folder.jpg saved in the folder for poster art. With each album added I make sure this is done properly, it took me about a month to catalogue everything, now the incremental updates are not a pain anymore.
I have used Picard on occasion. Since I retired, I now stream 90% of my music, whereas before I was downloading to an ipod/ipad for my commute. So most of my 25K tracks have been in iTUNES for years. I use Picard when I see that Plex has really torn apart a CD that iTUNES has together (like each of 15 tracks being taken as an album); or every 6 weeks or so when I pull some material I capture with Audials into the portfolio. I’m not all that experienced with Picard and have little patience for reading tutorials, but I get by.
Totally Get it, had matched my entire library to Apple Music and recently downloaded it again as I noticed some music was missing from Apple Music. Its a pain.