Hangar always uses stick zr (twist) axis for yaw even when not set

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/unwanted-z-axis-binding-can-t-be-removed-in-briefing-room/m-p/9626399/highlight/true#M4989