2019 AUDI Q7 Forward Collision Avoidance Warnings Problems

The auto brake suddenly braked hard and it was scary. The car reported a collision warning red light for a few seconds. Luckily, there was no car close behind me. While I was driving at about 70 miles per hour on the highway, there was no car in front of me to worry about. There was probably a car driving in the next lane. After the sudden brake, everything seemed to be back to normal. This type of sudden auto brake happened once in late 2019, on a local drive, I thought it was a falling leaf or something. But this time on the highway, there was nothing in front the car.

The problem occurs when making a left-hand turn. I'm in the left-hand turn lane waiting for oncoming traffic to clear. When it is clear, I proceed with my left-hand turn. After a short distance, the Forward Collision Warning indicator flashes, the brakes are applied very hard, and the car stalls. I am often left in the oncoming lane, with a stalled car. I have to put it in park, start it then put it into drive to move forward again. This takes a bit of time. This is 1) very startling, 2) makes it likely for me to be rear-ended, and 3) my car can easily be hit head-on by a car in the oncoming lane. I luckily have not been in an accident yet. This has occurred at least 5 times, with one additional time, the indicator and brakes being applied but the car did not stall. The dealer...