2018 Toyota Tacoma cruise control problems

I was driving with all tss (toyota safety sense) systems enabled (as is the only default setting on this truck) with three passengers (my young family) at about 50 MPH on a somewhat curvy mountain road. The truck's pcs (pre collision system) slammed on my brakes erroneously when a car (not in my path or lane) on a curve was slowing to turn off onto the shoulder.

Tl* the contact owns a 2018 toyota tacoma. While driving approximately 65 MPH with the cruise control activated, the vehicle suddenly accelerated to over 100 MPH. The vehicle was taken to suburban toyota (35200 gran river ave, farmington hills, mi) where it was diagnosed that the failure was due to a faulty sensor. The vehicle was not repaired. The contact indicated that the failure occurred on multiple occasions. The manufacturer was not notified of the failure. The failure mileage was 19,500.