Google Home voice control works only for me (application unavailable for everybody else)

Hi,
I’ve configured the “free” integration between my local home assistant and Google Home Assistant following this tutorial: https://www.home-assistant.io/integrations/google_assistant/
And it is working like a charm for me but for my wife not so much. She have joined the home, I’ve added her throught the console to the test application with all the required permissions.
She can control every device with Google Home application but as soon as she tries to use any voice command the Assistant responds that the application is unavailable.

They funny thing is on the screen where assistant responds the application is unavailable there is also a manual button to toggle light/device and it just works when clicked :smiley:

Any clever ideas what it could be?