Okay I think I know in theory why it is doing this.
To reproduce this bug, build all types of units ground and flyers (lots of them) and use "Q" or whatever is attack move on your keyboard.
You will get constant errors text:"no unit can execute that command" and the voice saying "that's impossible commander". The more units the worse it gets.
The reason I believe it is doing this, is some flyers may not be able to attack ground units or ground units can't attack flyers. Yet it keeps trying until it reaches the destination of the attack and move order.
It's sending out the request to keep trying so often it is bringing the game to a stand still.
Last edited by Naotomi; 07/08/13 10:43 AM.