NHTSA Complaint #11571547 — 2021 TESLA MODEL 3

While traveling west on [XXX] in Dane county just before exit [XXX], I experienced unexpected braking while using TACC. My cruise speed was set at 72 MPH and I observed the set speed changed itself to (I think) 40 MPH. This caused the car to quickly begin braking to slow my speed to this new speed. I had to intervene and accelerate manually while also trying to reset the set speed. Thankfully no one was directly behind me, as this was incredibly unsafe. This has occurred at this location more than once. I'm not sure if the GPS perhaps thought I was on the exit ramp instead? TACC and autopilot seem to work normally elsewhere. It has not otherwise been inspected. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)