Problems with Orbiter Smart Sensor

I installed an orbiter smart sensor on the toolhead. Seems to work fine. I configured printer.cfg according to: https://github.com/HelgeKeck/RatOS/blob/documentation_v2.1/site/docs/configuration/filament_sensors.md#orbiter-smart-filament-sensor-example-configuration
but shouldn't pressing the button unload the filament? On my machine nothing happens. No heating and unloading of hotend.

For testing I changed in my printer.cfg:
[filament_switch_sensor toolhead_filament_sensor_t0] pause_on_runout: False event_delay: 0.1 switch_pin: ^toolboard_t0:PB3 runout_gcode: RATOS_ECHO MSG="runout" insert_gcode: RATOS_ECHO MSG="insert" [gcode_button toolhead_filament_sensor_button_t0] pin: ^toolboard_t0:PB4 release_gcode: RATOS_ECHO MSG="pressed" press_gcode:

Only inserting the filament gives the message "insert". Removing it should normally give "runout" as I simulate a runout, but nothing happens. When pressing the button nothing happens.

The sensor status "empty" and "detected" is correctly shown under Tab "Miscellaneous"

Any ideas?
Im running RatOS2.1RC3-0

I got this version: https://de.aliexpress.com/item/1005007527028984.html
GitHub
The preconfigured Raspberry Pi image that makes it easy to run Klipper + Moonraker + Mainsail on your printer. - HelgeKeck/RatOS
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