Your not using your computer's wifi to airlink with the headset are you, as it is possible to do but isn't how its intended to work. The computer must be plugged into the router via ethernet, and then the router is what airlink's to the headset.
Sorry if I'm stating the obvious I just mention it as I remember I tried it the wrong way once and airlink worked pretty well - but not with anything demanding like games and especially not MSFS.