When you change your force - so that mortar is your enemy and it shoots at you - then whole "big sector" of map is showed in red when mortar shoots.
Screenshots from my tests.
https://imgur.com/a/lbnlYDj
Maybe it's inherited from AAI:Ironclad mod, but it's harder to test when there's no turret - only manually shooting vehicle.
I actually added more images to imgur post and posted it on AAI Ironclad dev discord. Maybe It'll get fixed on that level and will get inherited by that mod.
