I would make a backup copy of the album that’s being affected, delete it from Plex, clean up the database, clean the bundles, reboot, then re-add that single album back into the directory where it was originally located, causing the server to redo the whole import/metadata process all over again. Essentially the Plex Dance.
Are there any other albums under Various Artists that have this same behavior?
Is Various Artists used for Album Artist field in the file metadata?
Plex doesn’t do well with an empty Album Artist field for VA/compilation albums and Various Artists needs to be added to the Album Artist field for optimal results.