At that level, with time differences being so small, a person would only need a very small energy burst at a critics time to win a race. It may have been undetectable, even on the scales.
I wonder if the motor is also regenerative; in that while rolling downhill it acts as a generator and recharges the battery.
This is a total cheat, but I’m fascinated on how they managed to cram a usable motor inside the frame.