Are you using latest Traktor 2 upgrade POLL
My X1 was sketching out with Traktor 2.1.1
CUP wasn’t quantized and if I had sync on it would change the pitch when i hit it repeatedly.
I looked and solution was roll back to 2.0.3 (not upgrade to 2.1.2) which I have done and is stable again.
http://www.native-instruments.com/forum/showthread.php?p=985328
Where people at?
2.1.2 here, no major issues.
2.1.2 is working for me
CUP Quantized?
Two Words: Hell. No
2.0.3 if it ain’t broke dont fix it, been solid as a rock for me so see no need to change
exactly 
Yeah, I’m always a bit cautious with updates, so I haven’t updated since 2.0.3 as 2.1.1/2 did not seem the most stable judging by the feedback on here.
2.0.3 is proper solid. 2.1.1 was making me tear me hair out with the cup quantise thing and this weird tempo issue. Thought it was some mapping thing but couldn’t see it in mapping…
Still the smallest most frustrating mapping window to try and trouble shoot in and then to find out its a bug!
I was vexed
bump - i’m interested in wider demographic
Went back to 1.2.7. Traktor 2 has a few nice things, but mostly it’s just a step backwards with even more reliance on beatgridding. Sucks for those of us who play non-griddable music.
Word. Last bump
I’ve stayed away from the last several updates. They haven’t added anything that I felt the need to get, and my current version is running very smoothly… except for some latency issues. That might be my old ass needles though.