M5Stack Assist Not working

Hello there,
I‘m facing a Problem while Setting up an assist for home assistant.
I use an m5stack board and flash it with following website:

After the setup and connection to my WiFi, it shows up in home assistant.

After adopting it, it is fully controllable via HA.

But no matter which wake word I chose, it doesn’t works.

I am running ha os in hyper v with UniFi network. Wakeword addon is openwakeword addon and pipeline is all set to ha cloud. In my mobile app manually speaking it proceeds just as fine as wanted.

Is there a broadcast problem in my network or a configuration error possible?

Greetings