It does seem to focus around artillery. One minute there on 2d and 3d then they just disappear.
I did have one where it was only infantry v infantry and the unit disappeared, then another one of my units came up and it disappeared.
Another time I had two units come in at the same time and then all 3 units disappeared.
Again, though I think there may have been artillery somewhere nearby.
There are some really good features, but the only real gamebreaker for me is the disappearing units. I want to know where all the units are. I can handle the orders not being carried out, but losing men for no reason, not good.
As I said though. Love some other features. Excellent the way a garrisoned town slowly builds barrels and furnutire to hide behind.