I've had this problem ever since updating to Catalina last year where a lot of my album art was missing. I recently got a bit annoyed about it and decided to go around and look for a fix. I found some tutorial that said that I would need to remove some 3 files from ~/Library/Containers/com.apple.AMPArtworkAgent/Data/Documents/, and after doing that ALL of my art went missing from the Music app.
How can I fix this album art issue? Or is this a known bug?
How can I fix this album art issue? Or is this a known bug?