Mic of Blackshark V2X capturing Desktop Audio in Mic even after turning it off (externally)

I recently purchased Razer Blackshark V2X and when using it’s microphone, my friends on discord or other VC applications are hearing their own voices double times… Seems its microphone is catching desktop audio inside microphone… Even after turning mic off from external button, mic stops to capture my voice but they can still hear any in-game character noises from my Desktop audio… I tried using it on my laptop as well, but this same issue is perceiving. I have disabled the 7.1 surround sound software but that didnt worked.. I am having the wired 3.5mm jack variant of V2X. 

Help me out Razer, 

Thank you.