That for me and I doubt for the OP as well don't work. Remember my artwork issue with Music.App. Refresh does not nothing. Even a script provided by Florian, written by someone on here, does nothing. Music.app, is IMHO limited in reading external tags by that I mean tags written by programs like Mp3tag it only AFAIK (now) reads ARTIST, TITLE, ALBUM, YEAR, TRACK and COMPOSER and COMMENT, other tags get ignored like ARTWORK and GENRE unless you type this in or add the ARTWORK again
Edit:
Here is a link to the topic with that script Florian mentioned