It says this bug is fixed with the latest patch, but with no mods and on a brand new save after patch, removed localthumbcache ect, sometimes the one sim I am currently playing with still won't sleep. There are no sound objects or pets to keep them awake. Restarting fixed temporarily, but it begins to happen again after a while. Tried napping, sleeping on the ground, ect, and they would just immediately get back up.
Edit By crinrict: Adjusted Title