this happens all the time to me. The problem for me is that I forget I'm using a futaba radio. I forget to calibrate the radio to the controller, and i forget to reverse the throttle channel on the radio. so the esc thinks I'm driving around in reverse and jabbing the throttle to try and stop it lol
...I forget to calibrate the radio to the controller, and i forget to reverse the throttle channel on the radio. so the esc thinks I'm driving around in reverse and jabbing the throttle to try and stop it lol
99.99% sure this is the problem. In reverse, braking is very abrupt, which sound just like the symptom you describe. I bet your reverse (which is actually forwards) has smooth braking right?