OK so I managed to fix it.
This issue seems to be going on with USB wireless headsets when connected to OW2, and the way that fixed it for me was to:
Go into Device Manager
Open up the tab that reads “Sound, Video, and Game Controllers”
Find the usb connected your pc port, it should be in that list. For me it was “Xbox Controller” because im using an Xbox adapter, but it will most likely be different for you
Double click that USB in the tab so you can see its properties.
Navigate to the “Driver” tab and click uninstall device.
Wait for it to finish, then unplug your USB then plug it back in to reinstall that driver
Relaunch OW2 and see if it works. If not, im sorry, but thats what worked for me
Hope it can be of help