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.