Eastern Wastes - Ry`Gorr Fort, aggro warping through walls

[Vareous]

Description: Can aggro orcs through the walls at several spots around the outside of the fort.

Steps to reproduce bug: Run around the outside of the building whilst staying close to the wall.

Expected behavior: I think proximity aggro is normal however I think they are supposed to run outside instead of warping through the walls?

Evidence: http://youtu.be/gDGNx65oWCM Here is a video showing several spots where this occurs.