I also have replicated this issue a number of times with multiple npcs. It seems to me what happens is The cutscene for the die roll starts and then I think, 'oh, I didn't cast guidance' and I switch over to another party member to do that, and when this happens the cut scene gets stranded on the new npc who is not the person making the die check. When this occurs the game freezes because it doesn't know how to allow me to switch back to the first character who was in the cut scene at the start.
