quantum tunneling deer
This probably applies to any entity and any barrier in this game.
I have a farm enclosed by plank walls and plank walls with door. One day in spite of all the doors being closed, I found about 8 deer inside my farm tearing the place up. On the one hand, it made it easy to walk up and kill most of them. But, one of them ran to the other door to escape and before I could kill it, it managed to get through the closed door. On the other hand, that obviously shouldn't be possible. I guess I'm going to have to build another door or some other barrier to prevent that. They seem to always go to one door in particular to try to get in.