It's just dead obvious, if it was only one person complaining about it all the time I wouldn't believe it either, but literally 10+ people have been consistently complaining about these guys.
Oh, and something pretty fire, when I was duelling these guys he 1 hit me to yellow from the back of the duel room when I was full.
Highly doubt that's a 'glitch' given that never happened in the 12+ years Im here.