Hmm that’s weird, I’m not sure what’s going on there! I’ve never had that particular issue myself!
It sounds like you’re either getting some kind of crosstalk on the motherboard or you’re somehow adding your audio back into the voice line. Have you had this issue with other headsets? Have you tried the headset on a friend or family member’s computer to see if it works there?
I’m not really Corsair’s support department so you might want to try talking with them!
They’re nice people and I’m sure if it turns out to be a problem with the headset, they’ll get you sorted out.