I have had this problem as well with the A310 for MSFS. I have the latest version from the content manager. I have a ThrustMaster Airbus joystick that I use as a tiller only using the twist axis. My pedals are ThrustMaster TFRP. Looking at the pedals in the cockpit they appear stable so I don't think the pots are noisy. But as everybody else says, the nosewheel steering system will work fine for a while then suddenly keeps centering the wheel apparently for no reason, making taxiing near impossible especially at slow speeds with the feet on the pedals. I too believe it could be the slightest movement of the rudder that seems to affect the nws.