I've only noticed this issue recently, but I believe it's been happening since I moved to 3.9.8.
Essentially, all AI in the game will refuse to attack me in open combat, regardless of their personality type. They always priorities cover seeking, and until they get to cover, they will simply stare at me and not shoot. They will also often simply shuffle on the spot if the cover they're moving to is too far or too difficult to get to.
What is strange, is that they will also engage me in the open if I am prone, and will occasionally pop a single shot off at me if I am directly up against them.
I've observed this behavior across all bots (Scavs, PMCs, Raiders, etc.). Even Tagilla refused to attack me with his sledge after I walked right up to him, instead opting to seek cover.
No errors occur in the server or in-game console. Upon removing SAIN, bots attack me as normal. These issues are present across all SAIN versions for SPT 3.9.x.
I've tried changing load order (having SAIN load first, last and in the middle) and removing SVM (I'm aware some of it's settings could break other mods).
Any and all help is greatly appreciated!