I encountered a spot in the House condo in which at one corner of the the map (if you are facing your house, it is the bottom right corner i.e. just down the street) has a small “hallway”. The best way to explain it is as an image"
The red line represents the invisible wall that surrounds the map. As you can see there is a small area that you can get into. It’s certainly nothing game breaking, nor does it have much of any effect. It’s just a bit of an odd thing in the map.