I'm having a very similar issue, except it involves all sims (even chosen etc) who happen to be entering or leaving a rabbithole. They all get stuck outside on the path and by the time I notice there could be 20 or so starving to death and pissing themselves.
It has happened to me 3 times now at three seperate rabbitholes. The only way I've been able to fix it is using reset sim for every sim that is stuck. When they are all removed I then have to go into build buy and move the rabbithole slightly, if I don't move the rabbithole more sims end up getting stuck in the same place too.
Any help would be much appreciated!