Amazing game but unfortunately recently it started to glitch and crash severely. Sometimes when I open the game, the bottom of the screen seems to be cut off entirely, it goes black, only gets fixed when I close and reopen the game. Today it also started to not allow me to finish a battle by showing me an "error -1" screen, reopening the app doesn't help. Sometimes mid-battle it'll freeze and not allow me to play anymore, also about 200 of my gems disappeared today after reopening the app.