If you don't mind sharing it, what is the code that is being executed inside ai_init.sqf?
It should apply to all AI unless you made a check inside the script.

Weird, see no reason for it to exclude other units. Hopefully a dev or Savage can explain it more.

No fix but I can say that I reproduced this on a very basic level. Not sure what the issue is because I have done this before if my memory serves me right. From my testing it only inits on CIVS and not on any military unit (BLU,OPF)

I think something changed/got bugged. All of mine that I used in past missions are now broken.

Someone else on the CBA bi forums page is having problems with it too, Says it doesn't work on RC6 but does on RC4.

@tills13 can you link me the post so I can keep myself updated there?

http://forums.bistudio.com/showthread.php?178224-CBA-Community-Base-Addons-ARMA-3/page30

Issue was apparently a bug in CBA RC4 and was fixed in RC6 hence why it doesn't work now.

This parts for Friz/anyone else who edits the wiki
Fix according to KillSwitch: https://dev.withsix.com/issues/76194

(Correct way to call it in description.ext - Appears to be fixed already)

class Extended_Init_EventHandlers
{
  class Man
  {
    my_init = "_this call (compile preprocessFileLineNumbers 'my_script.sqf')";
  };
};

(This is a corrected version of the example my_script.sqf)

private "_obj";

_obj = _this select 0;

if ((side _obj == west) and (!isPlayer _obj)) then
{
  removeAllWeapons _obj;
  removeGoggles _obj;removeHeadgear _obj;removeVest _obj;removeUniform _obj;removeAllAssignedItems _obj;removeBackpack _obj;
  _obj addHeadgear 'Helmet_ACU';_obj addUniform 'Uniform_ACU';_obj addVest 'Vest_ACU';_obj addBackPack 'ACU_Backpack';
  { _obj addItemToBackpack "rhs_mag_30Rnd_556x45_M855A1_Stanag"; } forEach [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17,18, 19, 20, 21];
  { _obj addItemToBackpack "rhs_mag_m67"; } forEach [1, 2, 3, 4];
  { _obj addItemToBackpack "SmokeShell"; } forEach [1, 2, 3, 4];
  { _obj addItem "FirstAidKit"; } forEach [1, 2, 3, 4, 5];
  _obj addweapon 'rhs_m4_grip_acog';_obj addPrimaryWeaponItem 'rhsusf_acc_ACOG';_obj linkItem "ItemMap";
};

You need to put this at the top of the sqf that is being triggered

   private "_obj";

    _obj = _this select 0;

So yours would be called using

class Extended_Init_EventHandlers {
	class Man {
		init = "_this call (compile preprocessFileLineNumbers 'ai_init.sqf')";
	};
};

And the ai_unit.sqf would be

INS_fnc_initAIUnit = {
	private "_unit";
	_unit = _this;
	
	_unit setSkill ['aimingAccuracy', 0.2];
	_unit setSkill ['aimingShake', 0.5];
	_unit setSkill ['aimingSpeed', 0.2];
	_unit setSkill ['spotDistance', 0.4];
	_unit setSkill ['spotTime', 0.4];
	_unit setSkill ['courage', 0.5];
	_unit setSkill ['reloadSpeed', 0.5];
	_unit setSkill ['commanding', 0.5];
	_unit setSkill ['general', 0.5];

	_unit addEventHandler ["Killed", INS_fnc_onDeathListener];
};

INS_fnc_onDeathListener = {
	["unit died", true, true] call dl_fnc_hintMP;
	_tempRandom = random 100;

	if (_tempRandom > (100 - 100) || true) then {
		_unit = _this select 0;
		_pos = position _unit;
		_intel = createVehicle ["Land_Suitcase_F", _pos, [], 0, "CAN_COLLIDE"];
		_intel setVariable ["INTEL_STRENGTH", (rank _unit) call INS_fnc_getRankModifier];

		[_intel] spawn {
			// do stuff
		};	
	};
};

_obj call INS_fnc_initAIUnit;