Just a curious question. We have about three Pi’s dotted about the house and whenever I play music on them, the album cover is displayed on the first track, but the default “turntable” graphic on all the others in the same album. I don’t use a library, but each album is in a folder with a “cover.jpg” of 700 to 900 px square, and the same jpg embedded in the mp3s. Is this just a memory/processor thing? The Pi’s are all 4’s, running the latest OSMC. They’ve always been like this. Just wondering is all.
I’ve seen this quirk as a Kodi thing (not OSMC specific) when playing playing a playlist in file mode in that it only seems to read embedded or album artwork folder artwork for the first track. It doesn’t seem to happen with a properly scrapped library though. It does show the artwork with a file mode playlist in this situation for me if I put a folder.jpg or cover.jpg in the same folder as the album. That is to say, I couldn’t reproduce what your seeing. What is the specifics of how your music is organized and how/where in Kodi are you playing them?
I have NTFS shares to a linux box. The music is organised in simple album title folders with mp3 files inside. Each folder has a cover.jpg which is also replicated embedded in each track. I don’t use the Library as I prefer to just navigate to each folder to play albums. I might try putting an album onto a USB stick and see if the same thing happens playing it directly from there.