Everytime I kill some NPC with Iron Sights (sometimes with VATS), while hidden, i cannot loot the body briefly, i cannot reload nor can I enter my Pipboy. I also cannot use the Iron Sight again, it seems to make the >< reticle disappear whenever i RT Mouse click. This goes on for about 15 seconds, after every kill.

I am able to move around, but as i move it seems to lag, and i quick-move to areas, like being in a laggy multiplayer game. My internet connection is fine, its been tested, and I have not had this problem since the games release. Everything worked fine until the most recent patch.

I use no mods at all.

I attempt to enter Pipboy, after standing and hiding several times, and eventually I am able to enter Iron Sight mode and the Pipboy.

Steps to reproduce:
1. Enter a hidden stance with a rifle (only tried it with Trail gun so far, the .44)
2. Kill an NPC with your Iron Sights - preferably a headshot
3. Walk, while hidden up to the corpse
4. You will not be able to loot corpse, reload or enter your Pipboy

I also noticed that the head shot i am able to make with the iron sights shows a dramatic video, as if i used VATS for the headshot, BUuuuut, the dramatic video seems to last about 2-5 seconds too long.

maybe the game thinks i made a VATS kill and this mess's with the ability to enter Pipboy, reload or loot?