I've noticed that saving and reloading the game (in SP) fixes the AI not responding bug. This will also sometimes fix the AI not attacking bug but never for long.
I don't know much about the AI scripting in ARMA 3 so this may be completely off base but every time I see the AI not attacking bug it seems to happen after either a reload of the game or after entering an opfor vehicle. I don't know if possibly there is an issue with strings or not. Maybe when entering an opfor vehicle you and your team are placed in a "neutral" string and it fails to take you out? Could be that loading the mod breaks the team assignment for blufor and or opfor?