Other people hear cross talk form others even though using a headset

I was in two teamspeask servers, and the person I was talking to in the one, could hear people talking at me in the other server.

Apparently people can often hear themselves talking when talking to me. I use push to talk so at least I haven't been abusing peoples ears too excessively...

Win 10

Logitech h600 wireless headset.

Other people hear cross talk form others even though using a headset