On a ship, if you have a wall, window, etc. and you have your chests, boxes, wheel, etc. anything really near a wall you can use, you can access it through said wall or window.
I have recalled, respawned, turn on and off build mode...issue still persists and its one every ship I have built.
I am unsure if this issue is the same on land.
Attached are small snips of the issue.
This issue is probably keeping many away from going to MP game maps, I know that it is keeping me from going.