I experienced my 1st phantom braking. Last Saturday, I was auto piloting on the freeway at 70 mph. When there was a big bend and slight decline with an overpass, the car began to phantom brake hard. Scared the crap out of me, luckily there was no one close behind me. I have a radarless model y. I can see why the car brake hard, it thought the overpass was sitting on the bend and it will crash into it. Tesla Vision still have a long way to go on understanding the world. Looks like I won't be using auto pilot as often as I like now that I can anticipate trouble spots.