New iPad Pro12.9 when in portrait mode, holding it with both hands, right hand fingers behind the screen and the thumb in front of but not touching the screen. When my thumb is approximately 1-2 inches from the top of the screen and 1/2-1 1/2 inches away from the screen, the screen rapidly scrolls to the top of whatever is being displayed. I have tried to duplicate this by moving my thumb around and/or touching the screen, but no luck so far. Anyone else experiencing this?