2017 Cadillac CT6 Engine problems

When auto stop is engage taking your foot off the brake pedal from a complete stop when the engine starts back up it has a harsh jerk sometimes, it feels as though someone has hit you from the rear. This been going on for three years the car has been in service twice for this problem the service technician cannot duplicate it. *Tr

On more than three occasions, this vehicle has lost substantial or all propulsion due to engineering design defects with the gas/hybrid electric transmission system. All but one of these situations occurred on a high speed freeway causing potentially life threatening conditions when the vehicle substantially slowed or stopped. This is a known issue as is evidenced by other owners of this vehicle reporting the same issue and the manufacturer failing to have a viable permanent remedy. As of today's date, 3/4/2020, the vehicle has been in the shop for the past 62 of 92 days and is still awaiting repairs. This first occurred when the vehicle had less than 10,000 miles.