NumericStepper ruins KeyboardEvent!

Hi, I have a NumericStepper in my stage, and I have a Keyboard listener which listens for pressed keys.

The listener works fine until I change the value in the NumericStepper.
I think it’s the textField in the NumericStepper that ruins it.

But i’ve tried

myNumericStepper.textField.enabled = false
and
myNumericStepper.textField.selectable = false;

But nothing works. Please help!