The last one I specify "not always" in description of the problem, it's because once it happened, that when I was already controlling a UAV from outside any vehicle, and it was already flying and with the GBUs preselected, I forgot about the issue and got into an armoured vehicle, and being in the UAV gunner control, pressed the button to switch to laser designator (I use A2 controls so it's F), I didn't realize it didn't work, clicked and it dropped a bomb. That's an exception as "normally", with this bug, you can't fire a weapon or activate/deactivate the laser designator.