Warnings problems of the 2020 Chrysler Pacifica

When driving car gives the warning that fcw is not working and other error messages on the screen. When you apply the break, it automatically started breaking having sudden stops which is dangerous to drive on roads. For some reason those check engine lights will go away after some time and everything seems to be normal. Towed to dealer and reported to Chrysler multiple times and they are not taking car of this ones as they cant replicate the issue.

Coming to a stop in traffic at an intersection, at around 10 mph, decelerating at around 0. 1g, I did not get additional decel from the vehicle even with pushing the brake pedal to the floor. While coming to a stop I glanced in my rearview mirror and the vehicle in front of me abruptly came to a stop. During the reaction time delay from looking forward, recognizing the vehicle slowed and stepping on the brake harder, I received a fcw alert. I was already on brake pedal and after my reaction time elapsed I pushed hard on the brake pedal which sunk to the floor and gave no additional deceleration from the vehicle. This continued until the cib/aeb built pressure and stopped the vehicle, which was about 0. 25-0. 5s later. I didn't hit the vehicle in front of me but the very disturbing part was that the vehicle was not responding or decelerating with driver request.