I had a last minute job today doing a following shot behind a car, I upgraded to the new firmware update two days ago and shot on my own to test it with no problems also unknowing I would have this shoot today. During my the shoot today I would set the camera height and follow the car (only 1/4 mile) there are no significant changes in the height of the road and about halfway through the shot it would dip drastically almost hitting the ground. There was another part of the road where it would boom drastically up all while I was only moving forward. Any ideas???