I went for my first night flight the other night and I noticed when I let go of the controls when I got to altitude my P3 started to yaw to the right ever so slightly on its own, like it was out of trim or something with a conventional RC quad...So I tried yawing manually to the left and let go and the same thing occurred a very slight yaw on its own to the left. Now I thought something was wrong with it so I decided I needed a test flight the next day in normal day light. The test flight was perfect back to normal. Does anyone think that the VPS messes things up at night? Or maybe it's not the VPS at all...any info would be greatly appreciated.