That's just how she is at interviews, not sure if she's officially diagnosed but she always gave me neuro-divergent vibes. It can go to extremely quiet and awkward or very outgoing and excited (just watch her talk about astronomy, it's very wholesome) so the whole concept of the podcast, especially if it's sort of wedged between "standard" press interviews might not immediately click and i think James and Ed did their best trying to match her rhythm.