On Y’s guy or other times when he is video casting in, his de-essing algorithm threshold on his casting system is set too low. It is designed to remove background noise but ends up removing too much “s” in his dialogue…sounds almost exactly like a lisp.

He needs to have an audio professional take a look at his casting settings.

Edit: It is a bit odd that he hasn’t had this addressed as I’m sure he has an audio professional he can reach out to, but if someone here knows Hans and he would like help, I’m happy to jump in if need be.