Pioneer DDj sx3 play button stops working

I'm using Serato DJ Pro with the DDJ SX3 on a MacBook Air . Anytime I do any scratching, or spin the platter too fast on a manual search, the deck stops playing although the play button remains lit. If you hit the play/pause the play button goes on and off in correlation with you pressing play/pause, but the deck doesn't actually play any more. At that point, pressing and holding a hot cue button is the only way to get any playback. It happens on either deck, every single time no matter what track you load up. Any ideas ?