It crashes throughout the day. But especially it seems during championships. May be to many people on the server
Game crashing while making subs
I also have this problem. Not just in championship games but randomly. Nearly always in strategy but sometimes in gvg team list area or championship table areas too. Although it is less annoying in these.
Mine does too on the first sub, then the app crashes, i have to restart my ipad and i phone to restart the app