>>281450108
>Turns out it's caused by the USB 3.0 port not supplying enough power to the headset.
Makes sense. I changed usb port since then but haven't tested this other one yet. That's what I googled about my motherboard (b450 tomahawk) - the best port would be Gen2, right? 
Ironically, the problem occurred when I was using the port labeled "VR ready" on the backplate.