GAC bug - action buttons disappear

When fought against QA/MQG/POW using MM/Luthen/Pao with Pao's datacron, the handmade got killed by the DC affect and the turn mechanism froze it got into a deadlock, resulted the action buttons to disappear and me to quit and eventually lose the entire match. 

This issue already happened to me when Dark trooper got killed by a mass swarm attacks.