Pathing Guard Fredrick, Westyn, Oystin Pathing Issue

[QFuzzle]

North Karana:
Guard Fredrick (spawns at -4173, 1185, -29 -- inside building at the bridge leading to South Karana), as well as Guard Westyn and Guard Oystin (standing guard right outside the building).
Westyn and Oystin are stationary; Fredrick's normal pathing when not engaged appears fine. It's when they're engaged and fleeing that they will run off the bridge onto the shore/water near the building. Walking off further down the bridge doesn't seem to be an issue. Only near the building.

[QFuzzle]

Addition: Upon further exp'ing in that spot (killing those guards), I dealt with the guards walking off the edge of the bridge over the water in different spots a couple times other than what I previously mentioned. I wouldn't be able to pin point the spots. Just seems like there are a couple holes in the bridge pathing boundaries.