Nav on autopilot is pretty cool, but sometimes the car wants to change Lanes too much. My guess is that it tries too hard to get in the carpool lane but that is separate.
My issue is the cancel Lane change seems to work for about 3 seconds. The car decides to change Lanes, I press the blue cancel Lane change, it stops trying for a few seconds and then says it is changing Lanes again. Repeat. Very annoying.