Only one microphone working

I'm testing a game with my friend and only one of our microphones will work at a time

Helllo, I've got the same issue, when my wife (we're on the same wifi) log on the audio chat suddenly I can't see or hear the other players but she can (but she can me and i hear her). :/ It seems like just one person could use the audio chat on the same network. Thanks for your help

We had it similar yesterday where some folks could hear/see some people and not others, nothing consistent across the group as each person could be heard and seen by atleast 1 other person. Ended up using discord for voice. We had some people on the same network, but I tested switching two people to two separate VPNs and still saw the issue. I have 170Mbps up / 60Mbps down.