Cheating or Bug

I started the match with a 1–0 record in UT Champions, and suddenly I couldn’t control my players. It looked like each of them was being controlled by someone else, and because of that my opponent scored a goal immediately. I have the impression that he might have been controlling my players, and after scoring the goal he stopped doing anything. His nickname is kjl4uht2mc. Because of this situation, I lost my chance for a very good record.