I suspect the bug has something to do with the AI assigning themselves there own targets when in HOLD FIRE mode. In ArmA: Cold War Crisis, the AI would never state they are ready to fire when in hold fire mode unless the player designated a target for them. I'm not sure if this change was on purpose or a consequence of the migration of the AI code from the old to new engine, but it may have some unintended consequences, as described above.