@ktorster I created a separate thread for this since it appears to be a different issue.
To clarify, does the wrong cover art only display on these playlists when streaming Pandora on your computer?
If you log into your account through the Pandora app on a mobile device, does the correct cover art show?
Let me know.
Just an update, all my soundtrack playlists are updating now perfectly but the artwork issue continues on just those few.