X-Plane 11 with Ch Products Flight Sim yoke, rudder, and DesktopAviator GNS430 panel emulator. When changing the mixture control either through the lever on the yoke or through function keys, the mixture control starts moving towards lean but flips back up to full rich within a fraction of a second. Tried several airplanes and all exhibit the same problem. All other controls (including throttle and prop) work fine.