If loops trigger wrong. Or your sounds drops. Be aware it's probably not your computer! It's a software bug since 2017! Also still present in the latest pro 3.0 version. See video: I hope NI fixes this issue now that it became more public. It is 100% reproducable, even the Traktor support desk told me they could reproduce it. And if you can't see this video, it means this issue had been fixed. That's the deal!