I have the same issue, yuneec says thats not right! But I can center it calibrate it and it comes close but its either right or left of center. I have to manually center it. With that said, using the knob to rotate the gimbal inflight, if you turn it back to the center point it does not return the camera to center either it stays where it was pointing whazzzzzzz up?
Update, okay now it works, WTF? I shut it all down come inside, turn it all back on Gimbal goes to center on start up, but still no way to re-center it after the gimbal has been moved left or right with the controller..