2017 Chrysler Pacifica fuel system problems

While driving on a busy street, my 2017 chrysler pacifica suddenly lost the ability to accelerate. I was in an intersection pumping the gas pedal with nothing happening. The warning message on the dash read "shift vehicle to park" (or similar). I coasted to a stop with cars nearly missing me, shifted to park, turned the car off, then turned it back on, shifted to drive and pulled directly into a parking lot. I called chrysler roadside and was towed to the dealership where my car is now.

Transmission shifting issue. Vehicle was at a complete stop. When acceleration from stop and making a right turn , the vehicle acted like it slipped out of gear and back into gear. This caused a violent motion in the car.at times when I step on the gas to accelerate the transmission does not always engage properly and it slips causing a delay in taking off. I have had it back to the dealer for all upgrades or reprograms for this problem and yet the problem still persists.