INSTALLED album artwork not displaying
When playing on my I-Pod (160 GB and also an I-Pod Touch), the album artwork for about (a seemingly random) half of the songs decides it's not going to display for some reason. Also, when viewing a playlist in I-Tunes (I updated today, 6/19/2021) it also loses about half of the album artwork on the left column (see attached screenshot), but I know the artwork is in there because when I play the song, the artwork thumbnail correctly displays in the top (again - see the blue arrows in my screenshot).
My songs are a mix of purchased I-Tunes songs and songs ripped from CD's where I manually added the artwork. The non-displaying artwork doesn't seem to correlate in any way to whether or not I purchased the songs or ripped them. Most of my current library has been in I-Tunes for over a decade, but this problem only cropped up recently, like within the past year.
I have seen all of the overly complicated processes described on here for re-installing your library. As an attempted fix, I transferred my entire I-tunes library to a completely different computer (hours of work) and still the same problem exists on both computers, one running Windows 10 and the other running Windows 7. I'm convinced this is some kind of glitch in the I-Tunes software. It's maddening because I spent an insane amount of time manually adding the album artwork for the hundreds of CD's I ripped. (Using the I-Tunes "Get Album Artwork" feature for non-purchased files does NOT work because it does not give you the original album cover on which the song was released. You usually get some greatest hits album cover). Please do not answer with "re-install all of your album artwork". because #1 It's all already in there, as my screeenshot demonstrates - I have not found a single music file that doesn't display the thumbnail on the top of the screen, and #2 it took me dozens of hours to install in the first place, over many years of accumulated songs.)
Also, as indicated in my first sentence, the missing artwork display occurs on all of my I-Pods, including the two mentioned above (160 GB and I-Pod Touch, plus an older I-Pod with 8 GB. I don't know the exact generation of any of my I-Pods, but with it occurring on 3 very different models, I'm pretty sure its a universal issue.)
iPod Touch (5th Gen)