When I secretly kill a hostile NPC that I spawned, the NPCs in other rooms (combine, zombies) don't react, but when I see them, all the NPCs that spawned in the room come through the door and try to attack me. Is this normal? The problem is in the VJ Base snpc, when I move the or Crowbar swing it, they slowly move towards the door. (I removed the problematic addon called 'Global NPC Hearing System' and it still works.) Is this not a map issue, but normal for the AI ​​to react to sound?

I'm sorry my English is not good