I was on the flight with my Surface Pro for the first time and used a power outlet on the plane. When plugged in, the touch screen started to malfunction and stopped as soon as I disconnected the power. I tried again on the return flight and got the same issue. When plugged into a regular wall outlet, there is no problem. Anyone else had the same issue? The airplane power outlet was rated at 110V-50Hz, which is in spec for the input power requirements. Could my power brick be faulty?