Background shifts around on mobile

Background shifts around on mobile
0

#1

For some reason when I look at my quote machine on my mobile phone the background image will shift around and end up tiling at some point, then sometimes un-tile, but always seeming to shift around. This happens when clicking the button to cycle through quotes.

I am unable to reproduce the behavior in chrome dev tools. Any suggestions to fix this?

http://br3ntor.com/quote/