Is anyone else having issues with random album art being allocated to random albums?
Looks like part of your problem is unidentified albums. I was unfamiliar with Africa Hitech so I looked up their discography. They only have one album 93 Million Miles as identified by Roon. Blen is an EP. There is no official release simply titled Africa Hitech and you have three of those listed. I don’t know why Roon provided the seemingly random cover for these likely unidentified albums, but if you do a little work to let Roon identify them, they should then have the correct covers.