parking sensor delay?

[csakar]

does any one experience sensor sound and graphics comes a little bit late?
for example, when you get too close to a vehicle in traffic, it beeps, but by that time the vehicle is actually gone, and red cursors may appear on the screen even though the vehicle is not visible on the cameras.
Its not happening all the time but when it does, it alerts me so fiercely for no reason, or late...