missile units not firing their quarrels/ throwing their axes

[midterm360]

I've looked around briefly and haven't seen anything on this. My dwarven axethrowers and iron crossbowmen aren't firing their missiles. By this I mean they go through all the animations and the tool tip reads "reloading"->"firing missiles"-> "reloading". The sound effects for crossbows firing or for axes being thrown also play but they don't actually launch anything. Their ammo bar remains full and the snaga remain thoroughly not dead.

The weird thing is that this happens ~50% of the time but not all of the time, it happens in sieges but also happens in field battles. Also everytime this occurs the enemy unit is in range as indicated by the arrow cursors being coloured in and not greyed out.

Also they are in formation when this happens so reforming their formation isn't the cause either. I have tried moving them a bit closer but that has had little effect.

Any ideas what could be the cause here?

Thanks

[ElvenKind]

I have similar issue with my Elven Archers, it says they are firing arrows and the sounds of firing are there, but they don't fire anything. I think it's some kind of terrain as obstacle issue cause when I move them to different position and with no terrain obstacles, they fire their arrows.

[midterm360]

now that I think of it, the problem could be their firing arc, if they can only fire -/+ a certain number of degrees they wont shoot. It isnt obstacles (well it can be but then it wont happen to an entire unit). I'm saying this because when I said field battles I meant wide open fields with literally nothing in the way of the arrows, except maybe their intended targets.