[BUG] AI Pathfinding [Alpha 4]

I couldn’t find a specific post for AI pathfinding related issues.

Summary: Direct Path blocked by partial or whole walled in locations (with doors to get in and out).

Steps to reproduce: Build a wall around your base with one door, or only a long wall. Doesn’t happen everytime though. Something must disrupt the pathfinding at one point.

Actual Results: Items inbetween the wall and the stockpile area are ignored, attacks from goblins get stopped. Also workers outside of a walled in village, are not going back inside to eat/sleep.

Versions and Mods: Version Alpha 4 - No Mods

System Information:
Windows 8.1 | Intel® Core™
i7-3630QM CPU @ 2.40GHz | 8GB system memory | Intel® HD Graphics 4000
(4.0.0 - Build

As seen here the Goblins wanted to attack but couldn’t find a way inside.