Death Knights not playing

Why do I keep running into Death Knights that literally never make a choice/play? Run out of time for muligans and then every turn of the game. I can see them hovering over cards in hand, so I know they are there. Is there a way to stop them? Sick of 3/4 of my matches being a waste of time.

Cuz Blizzard is apparently is having issues removing their own bots.