NHTSA Complaint #11453011 — 2021 TESLA MODEL Y

On a cross-country trip from Washington, DC to Oklahoma City on Feb 5th and 6th (Saturday and Sunday) I tried to use the "adaptive cruise control" for the first time. Terrifying. The car would be driving along at 80mph, and then it would suddenly slam on the brakes, seemingly without provocation... with a 30-35mph sudden deceleration (absolutely nobody/nothing in either of the lanes in front of me). This was not while using the "full self-driving" feature, as I did not pay the extra $10k for this functionality, only the adaptive cruise control. Another very disturbing thing was that when the adaptive cruise control was enabled, it would not allow me to turn off the windshield wipers... and every so often the wipers would just start frantically wiping despite only a small bit of rain hitting the windshield (again, disturbing, as it is very startling when it happens out of nowhere). Needless to say, after this happened 5 or 6 different times over these two days, I turned off adaptive cruise control and kept it off. Tried to contact Tesla service, but they kept dodging the issue so I stopped trying.