Lost Artwork on Now Playing screen

I seem to have damaged my server's ability to display artwork correctly.Album covers show up in the server below the Now Playing screen correctly and similarly in album track lists on Touch but not necessarily in the Now Playing window (see attached) on server or Touch. I did a recan (cleared cache) and rebooted the computer but no luck. This happened when I put my computer in hibernation while still playing sonngs on the Touch. Oddly the Touch displayed the wrong time and date when the computer went into hibernation.

I should add that sometimes the artwork displays in Now Playing sometimes not

Attached Images