2017 Acura MDX forward collision avoidance problems

As I was driving in a stop and go traffic jam, the vehicle would not go forward although I was pressing on the gas pedal, the engine stall and when it finally reacted after pressing it for the second time it went too fast that I couldn’t stop in time to avoid rear ending the other vehicle, the emergency braking system did not function properly either. This has happened multiple times even when I driven on highways and there’s incoming traffic and the engine goes on stall.

Incident #2 driving down city street approaching an intersection. No car in front and no car behind. In the middle of the intersection the car auto brakes to a complete stop before releasing back to normal. If a car were behind me I would have most surely been rear ended.