So if you turn Richter into Rosie by suggesting to Rhianna to do something worse to him, the next scene in the courtyard, Akarion replies to the a comment about Marazet's ass... to no one. There's no one responding to him like there is if you change her to a girl or take the influence yourself.
(I'd include a screenshot, but it doesn't help that much since the bug is an absence of a character, which I can't take a picture of)