I had this problem for a long while where I had a slight hesitation when braking at low speed. at one point it was also on acceleration after braking. and it would sometimes feel like two pulses of hesitation.
VX1 in in PPM mode.
i debugged on various false trails of thinking it was my pulley slipping one direction and the other against the keyway. Thinking it was related to funky erpm limits I had tried. and sometimes it would go away and I’d think i fixed it. I would try to watch on the bench for any hiccups in the signal but I never did a clear and conclusive test.
Recently got worse and much more reproducibly obvious. I paired the remote with another board and the problem traveled with the remote.
So. looks like I’ve had a VX1 remote go bad. not sure how or if it’s worth debugging further.