Hey @stekkerbox! Is there a screw that holds the mic in place? If there is, it could be loose. If there aren’t any screws you can see, you may have to take it apart and figure out what is supposed to keep the mic arm tensioned. It looks like some gaming headsets keep their mic arm tension screws [https://www.reddit.com/r/LogitechG/comments/55kfwe/logitech_g930_loose_mic_issue/|just under the ear cushions], so it might not be too hard to access.
Good luck, I hope this helps!