It sounds like it was driving illegally.
Is looks like it too. See the video in post 4.
Just really smart AI learning to drive like human A-H*les.
I was driving in San Francisco today, and saw numerous Waymo robotaxis. While behind one on the freeway going into the city, it appeared confused, slowing for no reason and hesitant. I quickly went around it. Should change the name to "Oh-No".