I could not reproduce this with a clean, default install. Make sure no other devices have a nosewheel or yaw assignment. Remove any addons as they could be interfering, especially plugins. Lastly try a reset to default preferences:
Move the preferences folder (found in the Output folder) to the desktop, then restart X‑Plane and default preferences will be restored. If the default preferences do not fix your problem, you can simply replace them with the folder you moved to the desktop and restore your personalized settings.