Has anyone ever tried the translation angle? Like Jonah pretends that the earbud in his ear doesn't work, prompting some stagehands to come on in front of the cameras, distracting people. Remember this is live. There is no cuts. So once it's all sorted, she'd have to repeat the joke which is always an awkward thing to do and might throw her off her heels a bit and would (should) make it more obvious that it was a meanspirited thing to say.
And if she does repeat the joke and people laugh again?....You say sorry, but this new earbud doesn't work either. Then Miles Teller tries to defuse the situation by just explaining it in english and Jonah just goes "oh haha". And the interview continues