I just installed and connected Scratch Live. Everyting is working well, calibration 100 % on both turntables, no problems with tracking from timecoded records, no latency issues. I checked - all my cables are set up properly, including the THRU for the signal from turntables to bypass the Scratch Live card.

But, when I change from Line to Phono on my mixer to play regular vinyl, the player in Scratch Live still moves, in the strange way of course. It skips in one place back and forth (the stripe on the circle I mean), sometimes it plays a little and skips again. It happens in Absolute and Relative modes.
I checked if changing the threshold would help - it doesn't fix this 'problem'.
Well, it's not something major to worry about, but I would like to know if I can get rid of it, or maybe that's just the way it is ? Maybe it's my mixers channel crosstalk, but I doubt it really. I have Stanton SK-2F model.
I have my threshold on the far left by the way, on both decks, since I'm at home and it works flawlessly that way.