tl;dr track screen layout is off as in confused by actual screen orientation.
I've been having this problem for about a month now. I don't certainly know how to reproduce it, but I see it quite often. I launch Spotify on iPad and everything looks fine, but when I pull out the track/queue screen (one with large album art and play controls) it has layout as if iPad was in another screen orientation. In portrait mode controls are 'squeezed' in the top part of the screen and are off the right boundary. When I turn iPad into landscape mode: all controls re-shuffles and become visible, but they scaled down and take up only the top-right part of the screen. Basically, see screenshots attached, it's easier to see what's up. I have to force close the app (swipe it away in the app dock) and restart to bring it back to normal.
Spotify version: 18.104.22.1685
iPad model: Mini, ME276NF/A
iOS version: 9.3.4