Bro same for me. I use the Nvidia Broadcast to remove background noises and I use that in all other games and recordings. Instant Replay is the only thing that will allow me to change to it but yet as soon as I click the back button, it switches back to my basic microphone and it doesnt record that because I dont have the base mic set as any option on the Windows settings I was hoping to find a solution here but I guess not 😑