I'm having an identical issue. I was in the middle of taking damage from a check, put my ipad mini 3 down for a minute to answer the door, then came back to it a while later and got the same frozen screen. If I close the app, I can open it again, log in, buy things from the store, etc, but as soon as I try to do story mode I'm back to this screen. I assume reinstalling the app would fix things but I don't want to lose my progress.