This has been happening to me recently, but only in the last week. It happens to me on two iPhone 5S that I have connected to the same account, but only once on an android device. For my iOS devices, it crashes multiple times a day, sometimes in the middle of battle, sometimes when trying to scout in war (happened multiple times in a row trying to scout the same base, but half an hour later was able to finally do it), sometimes when tapping on battle button, sometimes... when not doing anything at all. As it has never happened to me before in several months of playing but only in this last week (although I'm aware some other players may not have been so fortunate), I wonder if the recent updates may have created more issues.