The motor is at maximum power and speed when this happens.
I sent it in and they fixed it. This is their explanation which I don't know that I fully believe:
Our engineers completed the repairs on your board! They found that the power button had broken which led to damage to the controller circuit board. Both have been replaced under warranty for you. After your board passed our post-op testings it was picked up by FedEx!
Firstly, sure pushback seems like it is noticeable but is it really instinctual to push less when something starts pushing back? A counterforce is good at preventing someone from moving something, but I'm not too sure if it's good at preventing them from trying.
Secondly, I have my doubts about a system of transportation that cannot slow down without throwing off its rider. I mean the automatic balancing is a fun trick, but it's somewhat concerning when the only response it has in case of problems of insufficient power is to accelerate even more and when that doesn't work it does a nose dive resulting in what looks like a sudden stop.
i love riding it. but it has happened a few times, and only takes once for you to not trust it
if an e-bike shuts off, you slow down. when a single wheel dies, you fall down