As far as i have noticed it is while in the cover/overwatch drill which makes AI unresponsive (which only triggers under danger). I had some *satisfactory* results by disabling it via formationFSM (allowing me to more arbitrarily give move orders to AI)**. In any case this could only be seen as a workaround, the engine should definitely provide both a scripting and a player accessible command menu order to bypass current self assigned AI moves and orders (see currentCommand) even when its in danger.
**(this is a hint a for you to explore fabrizioT and your bCombat mod)
Edit: Please take a look at
0015297: Ability to dynamicaly set searchPath parameter values (via scripting or command menu) (http://feedback.arma3.com/view.php?id=15297)