NHTSA Complaint #11454904 — 2022 TESLA MODEL Y

Using autopilot (adaptive cruise control) on a two lane highway. Vehicle slammed on brakes when a semi truck was passing on the other lane. Happened three times on same trip. False braking was not consistent as it happened once as semi passed beside us, once when the other vehicle was at least 100 yards away and once again when another truck was about 25 yards away. Lane in front of us was clear with no traffic in front of us. This did not happen on divided highways. Only on two lane highways at speeds above 55mph. In one occasion braking was so severe that vehicle slowed down from 55mph to about 20mph. A car behind us almost rear ended us. They honked their horn at us as they believed we were "break checking". Not the case. My wife asked to turn feature off and won't use until something is done to fix. The car has not been checked by Tesla. I have an appointment with them. There are no diagnostics indicating fault in the car.