When I pull mt left stick all the way down and then let go it stays there. It took me by surprise when I took my left thumb off the stick and my Phantom was still in full speed descent. Luckily I caught it before it hit the ground. It feels almost like it's made to do this as it kind of clicks into place at the bottom and stays there. Though I'm sure it's not supposed to. Has anyone else experienced this? I'm not sure if there's anything I can do to make it not stick. Even though I'm aware of it now I would prefer that it return to center when I let go.