I'm in the Grymforge and was told to take out the scrying eye, discretely. Done and done. Had Astarion, alone, out of sight and in stealth and sniped it. No reaction from anyone. Then when I walk him back to the party all the duergar immediately go hostile. The eye didn't even see Astarion, let alone any of the duergar. There is zero reason why anyone should be going hostile.