NHTSA Complaint #11526371 — 2019 TESLA MODEL X

While driving on autopilot, adaptive cruise control essentially, on a 300 mile trip last week the car had several, I think 5 total, instances of phantom braking. These occurrences happen in random situations, no consistent factors that seem to indicate what triggers it. It is often not only startling, but scary since it is almost always in a high speed situation with traffic. These events have happened in the past but not at this frequency. We have another Tesla, a Model 3, that also experiences this same phenomena. When I reported it to Tesla they said to reboot the system, which I did. Did not appear to improve. Otherwise they seem to be unconcerned about these events. I have had adaptive cruise control in other cars, mostly Lexus, where this never occurred.