Why is my album art coming up blank when I click to display it?

 Large Cover Art (ctrl + click on now playing album art) stopped working a few Itunes versions ago. Unfortunately it still has not been fixed. I do hope it can be fixed for the next version cos this was a really nice feature. Also, in it's current state, where a strange blank window is displayed, it is a replicable untidy bug in the software.

Here is he original discussion from many months ago when this problem first arose :

https://discussions.apple.com/thread/253048933?page=1

Thanks for any help in getting this fixed :)