Keeps crashing mid mission – DEAD TRIGGER 2: Zombie Games Review

I like the game but it keeps crashing while I'm in the middle of a mission and I have to reload the app and start the mission from scratch after I already made progress. I'm on an older iPad but this is still inexcusable. I'm not even able to get off of China missions because of this glitch.
Review by datGTgurl on DEAD TRIGGER 2: Zombie Games.