I don’t know if you’re still using “Personal media files” as your agent. Your old thread mentioned them.
In general: Use “Plex Music” for both Scanner and Agent. All the other stuff is outdated, unsupported, and will go away rather sooner than later.
With that out of the way: there are some basics which you want to adhere to.
Unless you do, you will be struggling with Plex.
Take your time and go through this thread (and also follow the links in there): Why is Plex ignoring all the metadata on my MP3? [SOLVED]
