Your guess as to what happened doesn't make sense.
A motor froze ??
Have you ever felt how hot your motors run ?
They are the last part of a drone that will freeze.
A motor "failed" ?
How do you know this?
What did you experience that led to...
Open or not, I would say "it depends". Did you purchase it new directly from DJI or assumed to be new from a re-seller? If from a re-seller you can't be certain what is in the box is really brand new as it could be replaced and re-sealed to...
At this point a verdict from DJI would be very welcome. Neither side is budging from their stance. My money is on the side of the telemetry data showing the ocean rising up and engulfing the hovering aircraft that was waiting for the “Big One”...
So, while you were actively flying did you see these references, not in retrospect and re-thinking, but while you were flying and making movement decisions?