Mine is doing the same thing. i have been asking around everywhere online and not getting much back. People are saying the cold is doing it but that would be very disappointing if that is the real reason.
I had mine replaced and it doesn't have the jello effect so I don't think its the cold. Tech support had me re cal the IMU, Gimbal, and Camera but none of that helped.
Mine is doing the same thing and I can tell you it's definitely because of the cold. The video will look totally normal if it warms up. Having said that, I still think this is an unacceptable flaw. Hopefully DJI does something about it.