Hi, my i30n 2018 15000 miles has developed an intermittent steering fault. Above 40mph usually within the first couple of miles of starting from cold the car makes a series of quite hard turns to the right. The steering wheel does not move but opposite correction is necessary to keep the car in lane....then the turning force to the right stops after about 1 second and the car veers left. This can repeat itself for anything from 3 to twenty times before it stops. The car has been checked by the dealer over 2 days and cant replicate the glitch or find anything wrong with the car. This happens with lane assist on or off. Any ideas chaps? Btw its bloody scary above 60mph!