Every now & then, I will have one of my people just walk off in the middle of a task. This seems to happen, most often, when they are half-way through preparing a meal, which is kind of irksome if the family are hungry! I know that if there is something to celebrate (e.g. a job promotion) family members will drop everything & dance, but this wandering off just happens randomly. Anybody else experienced this? Any way to stop it?