One-sided wall in lab map

[srmalloy]

In the 'Stop Sky Raider attack' mission from Justine Kelly (save 3 people, protect equipment), there is a one-sided wall in the lab map:

 

Zone/Mission: Tech_60_Layout_07_03 
Position: [-500.5 28.6 -378.8]

 

As you can see, you can look between the large pillars through to the walkway beyond. If I move around to the other side of these pillars and look back, though:

 

Zone/Mission: Tech_60_Layout_07_03 
Position: [-495.6 27.9 -332.2]

 

There is now no visible gap, and the wall appears solid (and it is not possible to teleport through from the gap side -- the teleport target rings appear against the distant map geometry, but they appear in the red color that indicates that it is not a valid teleport target.