@drzoidberg33, thanks for the reply.
Please provide exact examples (album and artist name, or even better the mbid or Plex guid).
Try this: add the album ‘I Am Not There Anymore’ by The Clientele, released July 2023, to your library.
Plex GUID: plex://album/64471be9fc3be59477a53009
Musicbrainz link
If your experience is anything like mine, Plex will retrieve two possible cover options. The first, selected by default, will be low resolution. The second, which you can select manually by editing the item in the UI, is much better. It’d be good if Plex could automatically select the higher quality option. I don’t know where Plex pulls cover art from, but the cover available via the Musicbrainz link above is of a higher quality than the default option retrieved by Plex.
Hope this helps. 
