Hi. I was driving on the highway yesterday using TACC, not autopilot. Speed was set at 69MPH. My car suddenly braked very abrupt to around 30MPH. There was nothing in front of the car. It scared the sh*t out of me and my wife. Never had that happen before. I'm wondering if there is some issue and it's worth taking in for service or it's just a software glitch. Anyone else experience this? Good thing it was light traffic or likely would have been rear ended. It's a Model S Performance 2020 that I bought last December. I love the car, but this completely caught me off guard.