Hello adamfromtempe,
Thank you for reaching out to Apple Support Communities.
Let's try to retrieve album artwork from the iTunes Store for your entire library to see if the correct ones appear. These steps can be found here:
"Add artwork to music and video
- In the Music app
on your Mac, click Songs in the sidebar. - Select one or more songs in your music library, choose Song > Info, click Artwork, then do one of the following:
- Click Add Artwork, select an image file, then click Open.
- Drag the image file to the artwork area.
To retrieve album artwork from the iTunes Store for your entire library, choose File > Library > Get Album Artwork."
Additional details are on this link: Add artwork to content in Music on Mac
If the issue persists, can you provide a few more details? How many albums did you notice this on? Does this happen with multiple artists? Also, which macOS version are you currently using?
Cheers!