Xbox series s game chat not working since next gen update!!!!

While we have had general assertions that TS steps have been taken, I just want to clarify that checking for NAT issues is something not to be skipped over. 

Past this wonder on some of the Xbox settings, can I check you've reset the audio settigns, you'll find the option in a menu at  Settings > General > Volume & audio output. 

I also wonder if setting up your audio again will help, and/or what your chat mixer settings are. I also wonder if audio is set to come out of headset, speakers, or both. 

Also I wonder, it's a bit of a long shot, but if you have access to a friend's system, can you play a match on that -or even just try opening the message like in your test- and see if you still get the same issues.