I had an unusual issue last night with a 120A 1S that I was hoping someone could maybe shed some light on.

Twice after a fairly hard hit the ESC seemed to go into a limp mode, or behave like the motor was running on only 2 poles. Upon inspection there was nothing mechanically wrong with the car and the gear mesh was fine, all the wires were making good connections. Both times it was near the end of a run, but there was still plenty of charge in the battery. The motor was at 65*C and the ESC 35*C. After turning the car off and back on again later the problem was gone. I haven't encountered anything like this before. Is it normal?