I took it for a test right after the update only couple hundred feet in my neighborhood but rth work fine... I tip is before you do much with any of your apps look at the controller point and the Drone point and see how close they are
I have about six flights with 3.1.3 and have not had any problems. Did a S2 Switch RTH this afternoon when I lost vLOS and could not see the Phantom 3 Standard against the snow covered mountains. Came back as advertised.