I have noticed this fairly consistently when following an A.I. squad leader though, instead of running, they crawl through fences instead. I have particularly noticed this when the A.I. has to pathfind through the fences outside of the Kamino Firing Range and also the military base just outside of Agia Marina. In all cases that I have seen this, it has involved chainlink fences - I have yet to see this happen with walls, myself, but I do not doubt that it happens.