I've only had FSD a few days but I am having a lane switching problem with my Model Y. Here's an example:
I am driving in the right lane of a 4-lane divided highway at the posted 60 mph limit. I wish to remain in the right lane and my route does not require me to turn for at least 10 miles. No other cars are around and I don't need to pass anyone. All of a sudden the left blinker goes on and the car initiates a lane change to the left lane. WTF? I flick the turn signal to the right which cancels the turn. And then a minute later the same thing happens again. It's like the car wants to get in the left lane even though there's no reason to do so. It also happens when more vehicles are around. In one instance, it commenced a lane change as a car was coming up on the left to pass me. That's when I used the steering wheel to pull the car back into the right lane, exiting from FSD.
Maybe you're wondering what happens if I just allow the car to change lanes. I tried that and as you would suspect, the car moved over to the left lane and just stayed there.
Does this sound like the same problem other folks are describing? I checked my settings and my car is set to "require lane change confirmation." This never happened before I got the FSD download a few days ago. Anything else that I'm missing before I report it to Tesla as a bug? Thanks.