Shutdown LED not working

[topas-rec]

I use a status led successfully, and added a led_pin to my shutdown button. (The same pin as the status led)
The LED does not flash when the shutdown button is hit (Shutdown button works - and starts the shutdown)

GPIO control config

DEFAULT]
enabled : True

[StatusLED]
enabled: True
Type: StatusLED
Pin: 12

[...]

[Shutdown]
enabled : True
type : Button
pin : 3
hold_mode : Postpone
hold_time : 2
functioncall : functionCallShutdown
pull_up_down : pull_up
led_pin : 12

[...]

Is it used and working somewhere?

[topas-rec]

Works, when setting it up correctly.
I made the mistake of using only a Button as shutdown button in the gpio_settings.ini. Using a ShutdownButton instead enables the blinking LED feature for this button.
Documented here.