You can also try increasing the deadzone on the stick to see if the effect goes away or reduces.I've just picked this up and enjoying flying around my local area. One thing I've noticed in the default Cessna, it's always pulling to the left so I've having to keep my hand on the joystick to correct this. Is this how the Cessna flies or have a got a dodgy joystick?
If there's no change then you can just reset it but if there is then the stick is pulling or might just need calibrated.