probable problem (LOD or physX?) on corners of the border fence (map or editor placed):

csla\csla_structures\border\csla_border_fence_corner_90_out.p3d
and
csla\csla_structures\border\csla_border_fence_corner_90_in.p3d

Players can pass through them. Simulation seems to belong to a straight fence (not a corner) as players seems to follow invisible wall on one side and pass thru on other side.