I recently bought an April 2019 build Ranger. It seems to exhibit the symptoms of 19-2052. It jerks and lunges at low speed when cold, jerks when accelerating when cold and lunges and feels like it is stalling out at low speed. Overall, it is really detracting from the truck. I took it by the dealer but it was both a warm day and took me 1/2 hour to get there so the symptoms were minimized. Based on my build date they declined to do anything — what should I do next?