2021 Chevrolet Suburban forward collision avoidance problems

We were stopped at a red light on florida state road 54 turn lane to go on us 75 when the other car rear ended us and drove us into the car in front of us. No air bags deployed. Florida highway patrol crash number 88482185. We only had the vehicle for 10 days.

The contact owns a 2021 Chevrolet Suburban. The contact stated while driving at an undisclosed speed, the Forward Collision Avoidance system activated and abruptly applied the brakes, dramatically reducing the speed of the vehicle. Later, the contact stated that while driving at an undisclosed speed with the Adaptive Cruise Control activated, the vehicle inadvertently accelerated, requiring the contact to depress the brake pedal to avoid a collision.