library updates glitches

1 - If I make changes to the tags on .mp3 files using Winamp or iTunes then rescan the Plex Music library associated with these files, sometimes the changes are not picked up by Plex.
2 - I am pretty ■■■■ about artwork of music files and use iTunes to add artwork. I always use files I have on the PC and not artwork supplied by iTunes. Plex will sometimes show artwork for another album instead of the correct one.

In the web interface, when you’re looking at your libraries, hit the three dots to the right for the fly out menu. Try Refresh All Metadata.

Warning: This could take a very long time.

Please don’t cross post. Closing.
Answered in here: https://forums.plex.tv/discussion/294058/library-update-problems-with-music-files