Dynaheir gets stuck in a dialogue loop in SoD if Edwin joins the group. She wants to get to the state which says "Thou invite this snake to join us, <CHARNAME>? Hast thou taken leave of thy senses?" but is sidetracked by the state which says "*You find Dynaheir on her own and in a quiet mood; for once, she is not sorting her scrolls or discussing things in a low voice with one of your companions. Perhaps it would be wise to take advantage of the situation and chat with the mysterious Wychlaran.*"
I think a weight on the former's trigger is in order.