Tradfri Sunrise and Sunset Timer

Hello together,

I have a problem and hope that you can help me. I have the old tradfri gateway and I am using the old tradfri smart home app from ikea. Furthermore I have the new Vallhorn sensor and the tradfri driver for the skydrag LEDs. Now the Vallhorn activate the skydrags everytime when I am in the area of the sensor. But I want to change it in that way what the skydrags will only turn on when im in the area of the Vallhorn sensor AND it is after the Sunset. Between the Sunrise and the Sunset the lights should not turn on.

What I already tried is the "ON/OFF" function and set the ON timer same as the sunset and the OFF timer at the sunrise but it is not working as expected.

I hope that you can help me or tell me if this function is not working in that app.