Oh god, i have just found a little bug
Maybe other players have find this before or it's already there before 1.2
If you put a body in a contener without loot him, a little bag is created behind it (with his items). If you loot this bag and go away far enought and come back, items will respawn in the bag. Therefore infinite loot (or shirt for me in this case).
I restart a new nomade character and it's appear in "the rescue" with the first scav.
I'm afraid it will work on rarer items or worse on iconics/legendary (like royce if you are lvl 12 or more).