I'm having a similar issue, the crossfader stops in the center, and on occasion I have to bring the fader back to the center point to get it to complete the transition. It also seems to do it on the upfaders as well. I'm not "super" midi savvy... so I didn't want to tamper with re-assigning or have it re-learning. I was able to map a MPD 24 to function with just Serato Video in the past but I am clearly stomped here.... Thanks