Don't know if this issue has been posted but I was playing around and use Galaxy Dragun to attack GEPD. Now since Galaxy Dragun negates the effect of any dragon it battles, I attacked GEPD but the AI tried to use his effect anyway and it created and infinite loop of GEPD being negated.

Edit: Ok so i found out it wasn't Galaxy Dragun that caused the loop. The loop will happen with the AI as long as GEPD has its effect negated if attacked.
Check the latest update , it should fix this issue.