SO. Sick. Of. Freezing

My husband and I both play this and maybe have it freeze up every 5 minutes. I cannot get past 9 waves of enemies because it always freezes. Here’s a screen cap of when my knight was about to attack and end the round for new 10 wave record and - who knows if I could have gotten to 12? I’d like to because I could have more teams. Yet, this has happened almost every time I get to the 10th wave in arena.

Husband says the same happens to him.