does this work with TFA base (ive been testing but cant tell)

AK-103, AK-400, AKM Tactical, AN-94, Remington M24 SWS and more have this problem for sure.
I have MWR Shared Pack (not sure if it adds any attachments though), Blitz Sight Pack and Yanky's Sight Extension Pack.

Well, quite a lot, actually. Here's a part of the list: [TFA] [AT]:
BR-99
Dragunov SVU
Fiveseven
GSH-18
IMI Uzi
Kar98K
MK-12
P320
SR-25
SV-98
Type-81
AK-103
AK-400
AKM Tactical
AN-94 Abakan
AR-15
AR-57
AUG A3
Benelli Nova Tactical
CZ 805 Bren

From what I could tell it's more frequent when spawning sniper rifles, probably something with long-range scopes... Can't really tell, I have these in the loot list for environmental loot spawning system. But don't worry, that issue is still there when manually spawning weapons, it's just that I hadn't much time testing it to specifically find the ones causing this issue. I'll try to do that in the meantime and will tell you again which weapons have this issue. Thanks for your support!

Thanks a lot for mentioning that, I didn't notice that so far.
Could you specify what weapon packs and sight packs you are using so I can look into this.

Sometimes on weapon spawn there's a loud "access denied" type of sound played, as if some attachment had failed to install