On my first flight since installing the new DJI Go App I was flying at 300 ft or so and in a straight line back and my bird yawed to the left on its own and it's never done that before. It wasn't a continuous yaw, it happened and I straightened my flight and it happened again but slighter and then flew straight back. I can't say it's due to the App, maybe coincidental, but has anyone else experienced a wandering yaw? I was flying at a location approximately 40 kms from where I calibrated my compass so I figured a new calibration wasn't needed. Any experience or ideas?