Objects floating in mid-air

I recently got the new pack in the sims 4 to own a business, and so I opened a café. After the first day of it being opened, I closed the store and when a customer was leaving, they took a muffin with them. But when they left, the muffin didn't. I have restarted my game 3 times and the muffin won't leave, it is spoiled and people walking by have their moods ruined, but i click on it and try to get rid of it, but then my sim tells me she can't go there.