I am not sure if this qualifies, but yesterday I played a guy in a close game but in the 7th I finally got the lead, and the game connection and speed had been fine all game, but suddenly he got the tying run at the plate with 2 out and I had a 1-2 count on his batter and the pitch started and suddenly the pitch went in super slow motion, all the players froze, but the ball kept crawling and suddenly changed direction, but went foul. I suspected he did this to try and cheese a bunt that went foul for strike three and quit, because the "lost connection with opponent" screen came up.
I will gladly take the rare win, but that was a very suspect moment.