Me and a friend of mine both had the same problems with our Rs pro's. I spoke in depth with Steve (DCM) and he raised the issue with Randy at Tekin.
The first question he asked was if the motor screws were slightly too long, and on a hard landing they could possibly be disturbing the motor and sending the ESC into shut-down mode.
The other observation that was made is that it only seems to be happening in shaft driven 4wd cars where the motor sits lengthways (i.e, same direction as shaft).
I removed the entire system from my 502 and installed it on my belt driven 511 where the motor sits side on, an since then ive not had one single issue, and neither has my friend as he also changed cars.
What car is yours running?
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