Everything is possible. I would not rule out camera defect or other component defect. If you continue to have problem I think you should complain with Tesla service to check your car.My car is fine. It has modern extremely capable hardware, capable of full autonomy: HW3.
Drive on a road at 50-60mph with traffic lights every half mile or so and report back.
I am curious if HW4 does better, actually, since I believe part of this could potentially be usable perception range. But I do think it is more likely a software limit, not perceptoon.