I’d say that’s more a credit to all of your abilities to converse in two languages. I speak French and am sometimes told off by my wife (who doesn’t) for lapsing into French in conversation with Francophones who speak English. I think it’s just the way of it when you get to a certain level of fluency, you switch without too much thought - or indeed mix and match when you momentarily forget how to say something in one language, or you another scenario I often find myself in is having conversations where the native French speaker is speaking in English, and I am speaking in French!