Engine Stall problems of the 2018 Volkswagen Passat

My father was heading home when he stopped the hill down from his house. Upon trying to accelerate he noticed the vehicle did not want to go. The engine had stalled/hesitated. He pressed the gas a few times and nothing happened, the rpm ha d was the only thing moving. Then, all of a sudden, the vehicle sped off and he lost control of the vehicle because this happened at the beginning of a curve and he couldn't regain control of the vehicle and slammed into a telephone pole which broke his neck and back. There is something wrong with these Passats. My brother and his wife have told me that their 2018 Passats do the same thing (hesitation/stalling).