Routing Voice Bug?!

Hy,

i used the routing functionality from the Fenix 7 Solar with latest firmware.

While i was "walking" and navigating, i connected my BT headset to the watch. I heared: "In xx meters left" "on track" etc... (i had my smartphone also with me)

But i cannot reproduce the voice output. With Bike and on a walk i only get the vibrations from the watch but i never heared the voice output again. (with all combinations, headphones connected to watch, connected to smartphone, with smartphone, without smartpone). My Smartphone shows everytime (Garmin Explore) "Navigation stopped by watch" but the watch is navigating.

My Target is: (WITH Smartphone, Headphones connected to watch OR smartphone): To hear not only "speed is 4.5 km/s blaaa". I want to hear the navigation again. While walking and also by bike.
Does anyone know this problem and how i fix it?

Kind Redards,
Christian