Submitted by Vtpnw on January 8, 2020
So today when driving home, my model3 suddenly decelerated while cruising at 60mph. There was no significant traffic in front of it that would indicate an eminent collision. Also not present was any audible warning. It slowed from 60 to 30ish. Fortunately there was no car behind that rear ended me. I quickly filed a BugReport using the voice command. I had dashcam on and have recorded the sudden deceleration. It is clear that there was no car merging into my lane.
So I am not sure if this is adaptive cruise control algorithm failing and/or evening lighting conditions (its a city interstate, not some dark highway in country). How does Tesla respond to the specific bug report to validate whether it is a sensor issue or algorithm issue?
How often have people experienced such a sudden deceleration? I drive on the same road everyday, often with AutoPilot/FSD on and works flawlessly, except today. I have the latest released update (Jan 2020).