This has happened to me 3 times tonight alone. After about round 60, the jackbot spawns are random. Sometimes they'll come out one after another. While this is frustrating and the most common way to lose in itself... the real frustration is the serious lag. Even playing local blitz solo when 4 jackbots all start stomping around combine with the 9 black jacks, the frame rate gets so bad the Jack bot's bullets are invisible and sometimes they don't even animate their knock away ground pound. I don't mind a challenge, but not at the expense of the game being almost unplayable from frame rate drop.