Step size Smaller stuck at 0.01

[TodWithOneFuckinD]

I'm trying to set up an external keypad to jog the machine & change the step & feedrate.

All is working ok, but the "Smaller" button (Divide Step Size by 10) gets stuck at 0.01"
I need to jog at 0.001" when I get close.
It seems the only way to do this now is to use the down arrow on the number field, or type in 0.001

Is there a way to allow smaller step size with the "Smaller" button. Or another solution?