No because relative speed between the two vehicles is different then stopped objects. These two things are treated differently by a radar system - imagine you

No because relative speed between the two vehicles is different then stopped objects. These two things are treated differently by a radar system - imagine you are driving in semi AV mode and you come around a turn and there is a vehicle on the side of the road stopped (i've been in this situation). For a hot second the car is pointed right at that fixed object and is probably still processing the lane curvature (if it can at all, some adaptive cruise systems don't have lane monitoring). The vehicle will ignore the fixed object and keep going as to not slam on the brakes which can be very dangerous.