Edit: I re-downloaded the installer for the Carenado plane and it that seems to have fixed the problem. I have no idea how/why this would have affected the default planes, though.
I have mapped the mixture axis for Engine 1 and 2 to two axes on my CH Products Throttle Quadrant in FSUIPC6. However, in game, the mixture levers won't move (Carenado PA-31 add-on aircraft, but same issue on default aircraft as well). Occasionally I'll see them jump up as I moved the lever, but they immediately snap back to the idle/cutoff position. I have disabled controllers within P3D. I'm using the registered version and I've attached the log file and joystick scan file.
TIA
FSUIPC6.JoyScan.csvFSUIPC6.log