Adding on here to say that this is now looking like a bug in the server software. I have another music library (for classical) that I have not done a thing with, and when I went to listen to a piece of music today, I see that all the of the “sort artist” fields in Plex have been changed to what appears to be a Plex default. For example, all my Beethoven files have “Beethoven, Ludwig van” in the “album artist sort” tag. But now all my Beethoven music simply has “Beethoven” in the “sort artist” data field. And where I had music with “Copland, Aaron” previously (as per the album artist sort tag), I now have “Aaron Copland” in the “sort artist” data field.
