It occurs on every range...when a unit is "infected" with this issue it remain until the end of the battle...
I will send you a saved game in witch I play german against french (the crossing of the river meuse from the long campain)
in this battle my two stug are infected and fires only he shells and the pzkw3 fires at same range ap shells...(roughly 1800 meter and not moving for 2 turns)
thanks for answering
