Ok heres my situation: I was on my last turn (next turn i would deck out), I was sure to kill my oponent (a top50 player who have an air/death deck using wings spider graveyard condor...) Because i had a spark 3 parrallel universe and a fractal, and 2 dragon that could attack through the shield. He had maybe 40 hp and his only protection was a wing, so i played my spark + my 3 parrallel universe and the fractal on it than i put all the fractaled spark on the play. I do next turn. My 3 first spark went through shield. Than for no apparent reason they all miss... Now what seem to have provocated the bug was the 2 graveyard putting lot of skeleton after each spark was dying. Anyway, thats it. The shield blocked all while it shouldnt!