While leveling 3 champs, i run ma shalled to carry them through. While doing auto battles (happens at any battle, sometimes the third run, sometimes the twentieth etc...) the game will freeze at the beginning of the third wave..... not completely freeze, i can still get to the pause screen but its like it lost connection to the server and wont progress. Have had this happen on 6-3 nightmare and 12-3 brutal so im assuming its not a stage bug. It happens on both my phone and ipad