Album Art display problems & quirks

Earlier this year I transitioned from a Mojave 27" iMac to a Monterey Mac Studio. This involved transitioning from iTunes to Music app for a ~20k song library. Bringing in the library actually worked better than I expected, but Music seems to have problems with Album Art. I understand that it pulls art from its Database and from the ID3 (so maybe I lost stuff in the DB transfer), most of the library previously had artwork attached... but the behavior it currently exhibits doesn't make any sense. The main problem is that most albums show NO art in Get Info>Artwork tab... as well as almost nothing displays a thumbnail in the left side of songs display... BUT most of the albums will display their proper album art in the mini-player and art thumbnail in the top now playing info box upon playing.

Any help or insight into how its reading the art and displaying it in some areas, but it can't seem to find it in others??

Another weird behavior I noticed is in the Songs display with art Thumbnail visible on the left, nothing will show up as having art until I mouse over the particular row for that song... then it shows, but the same behavior again upon close/reopen.