Why so many problems?

Why does the tournament have so many problems? I fought someone who had Entelomoth. My magna took out half his health then indo gen 2 finished him off. He brings in gemini kills my indo gen 2. I bring in tryko and then cast strike he casts delecerating rampage. Next round he swaps in dead Entelomoth and heals i can hear the heal but my game locks up. Rather than restart and finish the match i came here to complain since i had already lost anyways.