I've tried turning off all of my add ons and they still do it. I don't get why or what's happening. It isn't every mob either. The turrets react. The gunners outside react. Just, every once in a while, I stumble on [censored] like this.

http://images.akamai.steamusercontent.com/ugc/387670748344516178/0D2CE9DD6FB8EE6A83435613D50E03ADD1CC4395/

What addons are you using? May be a mod issue.

I turned them all off. But here it is:

0. Fallout4.esm

1. realistic headshots.esp

2. Armor_mods_expanded_v1b2.esp

3. RealisticLights.esp

4. ICPA.esp (Invincible companion power armor)

5. Upgraded_T-60.esp

6. Deadly Vertibirds.esp

7. NegativeAffinityIsPositiveAffinity.esp

8. CTHHostile.esp (Customizable Targeting Hud. Basically it only lights up hostile targets)

9. BOS_X01_Paintjobs.esp (Adds Brotherhood paintjobs for the X-01 series)

Well if FO4 modding is anything like SKyrim modding it isn't always as simple as just turning them off.

You edit your Fallout4.ini files for modding? You're using Nexus Mod Manager?

Only the initial thing to allow NMM to do its work.

Yeah. I'm using Nexus Mod Manager.