I have a problem with Fallout New Vegas, every single NPC will not spawn with a weapon. When i first see an NPC they will have a weapon for not even a second before it disappears and in order for them to have a weapon i have to reload the area (ex quick saving and quick loading). The problem also only happens to vanilla NPC's, custom NPC's from quest mods dont have this issue.

Here is my load order

GameMode=FalloutNV

FalloutNV.esm=1

TribalPack.esm=1

MercenaryPack.esm=1

ClassicPack.esm=1

CaravanPack.esm=1

DeadMoney.esm=1

HonestHearts.esm=1

OldWorldBlues.esm=1

LonesomeRoad.esm=1

GunRunnersArsenal.esm=1

AWorldOfPain(Preview).esm=1

QSkunkwaterGulch.esm=1

CFWNV.esm=1

Project Nevada - Core.esm=1

Project Nevada - Cyberware.esp=1

Project Nevada - Equipment.esm=1

Project Nevada - Rebalance.esp=1

IWR.esm=1

STUN.esm=1

ProjectBrazil.esm=1

Imperial New Vegas.esp=0

MercWanderer.esp=1

DragonskinTacticalOutfit.esp=1

DragonskinNCRPersonnelWearingOutfits.esp=1

Alternative Start.esp=0

CFW-DLC.esp=1

MercEnthArmor.esp=1

Road Warrior's Armor.esp=1

delilah.esp=1

desmond companion.esp=1

3DNPC_HopeLies.esp=1

CONELRAD 640-1240.esp=1

The Mod Configuration Menu.esp=1

IWR - Rebuilt.esp=1

aLB.esp=0

FlashlightNVSE.esp=1

TheLozza's_Gasmasks_V2.esp=0

Alternative Repairing.esp=0

Alternative Repairing - Ultimate Edition.esp=0

Alternative Repairing - Additional Campfires.esp=0

Alternative Repairing - Breakdown Item Icons.esp=0

WeaponModsExpanded.esp=1

DeadMoneyJunkRoundsReduxGRA.esp=0

Couriers Stash - Package Selection Menu.esp=1

DustSurvivalSimulator.esp=0

STUN.esp=1

Reactive People - Ultimatum.esp=1

Project Brazil NV Courier Stash Control.esp=1

Project Brazil NV DLC Control.esp=1

Project Brazil Project Nevada Patch.esp=1

PowerArmorSize.esp=1

What i had thought the problem was that the game had troube deciding on what weapon to give an NPC due to having both Project Nevada and Classic Fallout Weapons but disabling one of the two doesnt seem to help, same with only having one installed.

I have also tried verifying the integrity of the game cache which didn't help, i cant seem to find a solution and googling the problem doesn't help either.

Any ideas on how to fix the issue?