Plutonium

After doing some digging around on older posts, I found that one user checked their microphone's settings in Control Panel. Essentially, I found out that if you turn off listening for the device, it gets rid of the echo (and the white noise, which I did not notice until now).

I just recently downloaded this, and realized that it was echoing both my microphone's input and my friends on Discord. I can confirm it is not a Discord issue, as I muted myself and still heard the echo. I have checked the in-game settings and turned off voice chat, but I still hear the echo. Is there any known way to turn off the input echoing?
Edit: I can also confirm that it is not a fault of my mic. It does not echo anytime except for when Plutonium BO2 is open.