This is the 3rd or 4th time I have observed sudden unexpected acceleration when at a full stop at a light while using FSD Supervised (v13.2.7 just updated). It first happened 2 or 3 times on FSD v13.2.6 when mine was the lead car at stop lights. This time I was at a stop light but obviously not the lead car. The truck in front of me was blocking view of the traffic lights. Each time, I have hit the brakes immediately, so I don’t know if the vehicle would stop on its own during these situations, but I have no issues with it safely braking at any other time. Other than this intermittent glitch, FSD has been flawless on the HW4 next generation computer, which may lead to driver complacency not expecting this. I am reporting for awareness & hopefully correction. I have MP4 video files of the incident, but I cannot upload them here.