Sound changes when joining a channel

Hello Guys,

I have a Jabra E75 headset and it's pretty well but I have an annoying issue with it and discord.

that's the situation: I'm watching a video or stream and I join a channel on discord, as soon as I enter in it, the sound quality changes and seems to come from far away. 

It's 100% link to my headset but I can't find a way to fix this. 

Any of you encountered this?