Driving a Tesla for almost a year now and when I had mine for 2,5 weeks it crashed into a car in front of me on AutoPilot in slow moving traffic. Stop and go. After 15 stops, it moved again, but this time didn't stop. I just sat there expecting it would brake. It didn't. There was no major damage, just about $1500 due to a small dent in the hood.
AutoPilot is beta. Don't trust it to be quicker than you. It will fail in ways humans do not ever expect. Always pay attention and take control if it feels off.