2018 Model S owner here. I got 2018.16.2 update and the incompatibility between Sentry Mode and AP started.
As far as I understood, Sentry Mode doesn't let AP computer sleep. Then AP stops working. The initial symptom is high beam is ON when I start driving in broader day light as i enable Auto High Beam (the auto part is gone though). Car can't see lanes anymore.
I did the reset method and it worked but then the problem comes back. 2019.20.1 seems to have lowered the chance of this happening significantly but I still got it for the second time today.
I did a Bug Report via the car speaker button. I thought to share it here. Or should I send Tesla a private email? And how?