Reply to Traktor s2 pitch fader issue

Last week I had a problem with my s2, I'm running the djtt mapping, I was having a little party with my friends, we were playing some music for fun.
At a certain time I try to teach to a friend how to beatmatch, but then I encountered a issue. Pitch faders were not working, well, they were working, but bad, really bad, not responsive, they jumped up and down in the program, and they didn't follow the hardware pitch faders.
It was the only time that I had this problem, so, I really don't know if it was a hardware fault (subwoofer under the table ) or program one.
Mmh
No one had similar problem with an s2-s4?
Tp2 2.1.3 on mbp 13"
Traktor s2 (djtt mapping) + x1
Every driver updated