back when I used to have model 3, I had a horrible experience with auto-pilot which I described here https://news.ycombinator.com/item?id=27306550#27307011
Seems like things are no better with model Y. It is seeing things that aren't there. Other people have the opposite issue with it- it doesn't see when it should see things :)
One more issue I have found is that while taking a ramp, sometimes it thinks that I am departing a lane and applies auto-correction to steering. The first time it did it, I jolted my soul. Imagine taking a regular ramp and suddenly you hear sharp beeps and the steering wheel rotates on its own. If someone from tesla wants to reach me, I can provide the exact location it happens.