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 thought it was meant to display the album artwork but it doesn't do it with any of my albums. HELP!

Sent from my Nexus 5 using xda app-developers app

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