When I'm playing on the dragon fire 2 world after I choose my nation it boots me off the app not long after

Ok so I bought the dragon fire 2 nations world in the market place. Everything goes well with that side of things but then I open it up, choose my nation, and that goes good but not long after, it boots me off the entire app and no matter what I do I can't get it to stop doing that and it's only on my tablet. I can play it just fine on my Xbox so I don't know what's going on.