unwanted z-axis binding can't be removed in briefing room controls

Yesterday my Z axis on my T.16000m started flaking out. I can unbind it during regular flight, but it is frustrating in the hangar and briefing room that there seems to be no way to unbind it.

There is a duplicate of this issue at https://answers.ea.com/t5/Bug-Reports/Hangar-always-uses-stick-zr-twist-axis-for-yaw-even-when-not-set/m-p/9738858/highlight/false#M6300