Noise in the wheel area at the front right of the Kia Sportage II

KIA Sportage, JE, Have the car now 5 months (was used and at the time 4 years old) and am basically satisfied. However, from the beginning a noise at the front right when driving through potholes that is not part of the normal flow and spring noise. As soon as I take the gas away, I hear the noise away and only the normal impact noise in case of frost damage. Especially if it is as now in the temperature minus area and the car has stood for longer time, the G It was at the KIA Vertr. Werkstatt. There they did a test drive and they could not definitely determine that, was in my opinion somehow adviceless or amusing….. Does anyone have a hint about that.????