I recently upgraded to traktor 4 pro. I use the mixer deck when I dj live. During my first set one of my tracks suddently jumped to "chip munk" speed and the speed button froze with the plus and minus controls disappearing as well resulting in loosing any option to regain control of the speed of the track. Any new track I placed in that track played at chip munk speed. In addition I was not working with the speed on that track when the incident ocurred, so it is very unclear what happened. I believe it’s possible that I did need to hit a random key to light the screen so that I could see, but am not completely sure. It just happened again this morning which is why I am writing because it doesn’appear to be a one time thing. Both times, I had to shut down and restart traktor for the settings/controls of the speed of a track in a the deck to return to normal. Does anyone have any idea why this could be happening and how I can prevent this?