Sims not leaving Apartment

I have had this problem before and it was caused by wall placement at the top of the stairs. I copied the upstairs. Deleted the upstairs and then the stairs themselves. Put the upstairs back. Checked the walls, roofs, etc and then put the stairs back. This resolved it. My roof of the upstairs was blocking the top of the stairs but I couldn't see it until I removed the upstairs.

Hope this helps.