Hello everyone,
i have a little issue, probably i've set up something wrong but i can't figure out what it is. Hope someone here can help me to sort it out.

First my setup (relevant parts imho): HTC Vive Pro with built-in headphones, GTX1080Ti, Realtek Audio (Onboard Motherboard).

Problem:
Playing on the Vive Pro, CC doesn't seem to play the voices of chief and spotter. I can hear the radio butten being pressed.

Info:
CC Messages playback device and Background playback device are both set to the HTC Vive output. At "Start application" i can hear the "Radio check" from the Vive Headphones loud and clear so this should be correct.
Once ingame, all i hear is the crackling sound when radio button is pressed/released, no voice at all. Game audio plays fine on the headset.
Countercheck on starting the game in non-VR mode, CC voices were just fine, heard them in the Vive Headset loud and clear.

tl;dr
CC works fine just no voice in VR.

Hope someone knows what i'm doing wrong. Log shows no error so far and i'm out of ideas.