I'm getting tons of problem with elf female warden archers and dwarven gunners.
They just don't want to shoot. Only reliable way is to move them in range and click stop. Not ideal at all. Attack move seems to cut their range in half if they even fire at all. I stopped using the elf ranger archer because the stance they do never works and often bugs your units.
Sometimes while units are moving I can toggle attack move off/back on and they will fight.
I get this sometimes with melee but it is not as common.