Believe wording on my 2020 X was 3 Autopilot disengagements. Believe used 1 yesterday going 77 mph. FSD slowly passing semi in left lane. As got by truck tires it started throwing rocks and mud as we hit a couple small bumps. I manual accelerated with FSD still on to keep the junk from hitting the window. Went over 80 and got put in Auto pilot Timeout for the rest of the trip. Strike 1.
Not going to whine but I will. This is a problem FSD is not equiped to handle(yet?). As a Driver, I saw the dirt with my eyes and heard the junk hitting the car with my ears. So I took evasive action. Add that to the training I guess. (but please fricking fit Phantom Braking first!)
This may not be an FSD counted strike if it happened while you were under the NoA mode. Check your AP menu to see if you really have a strike accrued.