Recently FSX has started doing this weird jerking motion usually to the left while I'm flying. On my GPS the heading is the same but on my main panel it shows my heading slightly deviated from the route I was flying before the jolt.
It's like the aircraft is correcting the heading indicator, but when I push D (heading correct) it does nothing. My plane just keeps jolting to the left and then turning to a whole new course.
does anyone know why it does this and are there any ways to make it quit?