Good question. The two answers are different on purpose. While you’re speaking, the live text only grows: once a word has matched across two reads it’s never removed, even if a later read changes its mind. That’s what keeps the live text from flickering. When the sentence ends, the whole utterance is decoded again in one pass, and that result replaces the live text completely. So if anything was wrong in the live text, the final result corrects it.

On the long pause: if you stop for more than about 400 ms, that counts as the end of the utterance. The first half gets its final result straight away, and the rest starts a new paragraph. A mid-phrase pause can therefore split a sentence in two, and the first half is decoded without the words that come after it. That’s the trade for getting text quickly. A longer hangover setting means fewer splits but a later final result.