No, it depends on if someone in the DevTeam navmeshed the map.
Navmeshing is a process, where the playable area get a green shiny (ingame invisible but you can turn it on) web, made of triangles.
Objects like houses, fences, trees, rocks, walls and more... (all object where you can collide with) causing holes in the navmesh (boundingboxes of the object).
That's the reason, why bots (in normal case) dont walk versus walls, carwrecks and more. Bots can only walk/drive on navmeshed areas.
It existing 2 different type of navmeshs. Infantry- and Vehicle Navmesh. Infantry can walk on the InfantryNavmesh and vehicles drive can only on the VehicleNavmesh but there must also a InfantryNavmesh.
InfantryNavmeshing creates navmesh in enterable buildings like bunkers, t-shape buildings ... mainly interiors.
VehicleNavmeshing creates a navmesh only in open areas.
PIC 1 and 2 are pics of the InfantryNavmesh (2nd toggled objects)
PIC 3 and 4 are pics of the VehicleNavmesh (4th toggled objects)
Kashan got an terrain update and a bigger village. When you use the old navmesh. Its possible that the vehicle driving against the new village objects. The terrain update could caused, that the navmesh isn't anymore at the right place (to high, to deep etc)