Google Play Music app topic

I don't know if this has been brought up already but this is really annoying me, can't seem to find the answer. Does anyone know how to fix the horrible grey background that's appearing in the music app, I've attached a picture to show what I mean, I have the album artwork and I've tried clearing the cache and data, refreshing the app etc but still nothing. I thought it was meant to display artwork but it doesn't do it with any of my albums. HELP!

Sent from my Stormtrooper N5

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