I came across something strange yesterday in several custom battles. Playing on one of the custom battle maps (forgot name but it is a 1 vs 1 battle map) that has lots of fences and cover I had 10 units composed of grenadiers, line units and skirmish infantry. I had all of them taking cover behind the walls and only the skirmish units would fire the entire battle. Every other unit would just sit there and not fire back when in range of the enemy. I did 3 battles on the same map using various infantry units and all but the skirmishers just sat there and did not return fire. Does this happen in the campaign battles as well?