This bug has been present for a long time now. I have a bluetooth headset, and when I start the game the game audio keeps getting sent to the “handsfree” output even though I have the “stereo” output set as default in the settings.
There used to be a fix where you open options in game and go to the voice chat settings tab, but that has been removed for some reason.
Hello Haemocyte,
The ingame voicechat hasn’t been working for ages, that’s most likely why the voicechat settings have been removed with a recent patch, we’re awaiting for a confirmation on our end.
Bluetooth isn’t really suitable for gaming to get audio + voicechat functionalities at the same time due to the bandwidth limitation. As a temporary solution, you can try to disable/disconnect your bluetooth mic in the Windows Sound settings (recording tab).