hmm, i don't think i've downloaded it shortly after the release, and i didn't see any powerup glitch. it just desyncs. with more detail: (not so much because my english isn't good, sorry.) until we start the match, everything is fine. when we do a point, the game desyncs. or a little before that. example: i scored a point, but for my friend he scored it, and the ball desyncs.