This is an issue for me also…
I completely emptied the library (for the 4th time since starting to use Plex Music a month ago) and added all my music again from scratch. Everything is tagged correctly using MP3Tag, with every track having a non-empty title, artist (and album artist as it seems Plex can’t cope without it) and album tags. The latest import has about half of the Artist tags missing. Refresh Metadata does nothing to fix it when run for the affected Album, Artist or Track(s). The only thing that seems to have any effect is doing the Plex Dance for each affected album. I’m not going to do that 500 times to fix all of the broken tags!
I know bug fixing isn’t sexy, but it’s an important part of selling a commercial product.
*** UPDATE ***
A lot of my metadata issues appear to be related to the iTunes “Compilation” flag, which groups albums into a single “Compilations” folder. Perhaps @Plex could extend support to include this tag, as well as making the “Various Artists” value configurable?
As others have noted, turning on “Prefer local metadata” definitely helps. I also turned on the “Include music libraries in automatic updates” setting in the Library section, along with partial scanning. Despite the warning (Linux inotify limit?), I found related info on this here: Linux, inotify, and CIFS... Oh My!. It’s possible to increase the amount of inotify watches using the guide here: https://unix.stackexchange.com/questions/13751/kernel-inotify-watch-limit-reached
With these settings both turned on I can edit the comment tag for the broken albums/tracks and the files will automatically refresh metadata just as they do in Movies/TV sections.
Hope this helps anyone else with these issues!
