disable controller R3 autorun in camera direction?

(PC version FFXIV)
When I press R3 (stick click) on my PS5 controller my character faces along the current camera and starts autorunning. R3 again stops the autorun. I have tried System > gamepad R3 = 'not assigned' but this makes no difference, the autorun still occurs. (note this is not the same as the assignable 'Autorun'+movement_Stick which initiates autorun in the current movement direction, which I can disable)

Surely this is a feature? If so how can it be disabled?