iPhone 6plus 10.3.2
Campaign level 18 & 19 elite
crashed out to desktop every 2-4 attacks
sometimes a hero would die but still got 3 stars
i have VIP 5, so i use auto & fast all the time
one attack it was going so slow i almost fell asleep m
also crashes out of guild wars, titan temple, boss pit, fight pit, coliseum, mountain, challenges, crypt & expeditions.