The ESS is supposed to save fuel in the similar situation which you are describing (I presume it is meant for longer signals where you might be waiting a bit before getting the green light). If the situation is as you described - stopping for one or two seconds only, and the traffic is likely to be a prolonged or protracted, then I would simply disable the feature by pressing the ESS button. If it is only a one off situation and I don’t want the ESS to kick in, then (as described in previous post) I press the brake only very lightly that the car stops but not enough to trigger the ESS. In all other situations I let the ESS runs its full course. At least it makes me feel good that I’m not burning fuel unnecessarily.