Sims will suddenly go 'Out of the World' to infinity

I took a buble bath for my toddler and then ask my sims to give her food in a high chair. Then my adult sims just walk away. She was passant through the wall and floting in the air while walking away. When she finally reach the end of the Maps she just walk in circle and I couldn’t do anything. I couldn’t deleate the list of thing to do for the child or the adult and it was saying that my child was eating and that the mother was giving her food. The child was actually still in the bathroom and couldn’t move. But i quit the game and save my game and when i came back my child was of the chair and full there was a bol on the chair and her parent was at the front of the house like of she just came back from work.