@GoodboySeems like some others experiencing the same issue: https://www.reddit.com/r/Stadia/comments/e1u9pt/anyone_else_having_issues_plugging_a_headset_into/ and https://www.reddit.com/r/Stadia/comments/e323ll/stadia_controller_with_a_headset_plugged_in_and/
Have you tried using another headset? Does that do the same thing?
Thanks for your reply. I’ve used three different 3.5mm headsets, I experience pretty much the same issue. The first two times my entire 5ghz network crashed, my phone disconnected and so did all my smart speakers. Now my experience is a bit more inline with what’s mentioned on that thread (thanks for sharing!). I’ll check my QOS settings on my router. Seems I can’t turn it off at the moment.