I don’t know how Volumio implements getting album art. But every now and then it shows a random album art from my music library when some other song is playing. My songs typically have embedded album art. Sometimes I have a poster.jpg file in an album folder.
So I might be playing a Mozart piece, and Volumio shows an Elvis Presley cover.
Is there anything in logs or else I can check to help troubleshooting this problem? Seems like Volumio has some index of covers that is messed up. The problem persists despite recent Volumio updates.