I have also seen possible flank/rear attacks NOT happen when I would expect them to, but, I assume this is because the guns could be turned around (not modeled in 3d view ????) and the Inf/Cav do not feel brave enough to attack.....or it could be a bug still to be fixed !.
I wondered about this. In my case the troops were well within musket range but the arty didn't fire until the troops moved in front of the guns - suggesting the guns were not turning or threatening to turn.
If arty has cavalry sat in its' rear but the arty need not worry or try to fire till it obligingly moves to the front of the battery, I think that an error is present.
The infantry were later also directly behind the guns & somebody should have fired if the fault lies with animation to show facing, but no-one fired & the order to attack was simply put on hold.
I am wondering if this is a variant on the 'out of map' bug I've seen before where artillery were 'undetected' but could fire if they were facing correctly at the oncoming troops with impunity.
The crux seems to be the unit 'perception' of the situation:-
- if we are facing each other we fight;
- as cavalry we move to attack & then because units attack from facing positions, we move to the front...
Not that I claim to know exactly how JMM has set up his AI instruction set, this is just how it seems best explained.