idk if this is a me only experience
have you ever been invalidated by another autistic person when talking about your special interest because they start fact-checking you and you misremembered something? And then you feel like a "bad" autistic, so every time before you talk about your special interest in front of them you feel like you have to proof read what you want to say before you say it? same goes with misspelling something related to ur special interest or getting a small detail wrong.