When you kill a player and you TAB in order to loot him, you cant drag the items out of his body on the ground.
You also can't drag the items directly from his body to yours and replace them directly.
For example.
1.Click on the killed player's pants with items in them and drag them towards your pants.
2.Confirm that you can't replace them.
3.The only possible way to loot the player is to pick up his pants(from his body) in your hands and then replace them with yours. That works with all his gear (I think the gun as well)

Additional note: Yestarday (15:03:2017) we killed a player and we couldn't take his B95 gun from his back. We tried double clicking, dragging, taking to hands.

Notes: I think this issue might me related to the killed player alt+4 the game.

When I played with my squad, one of our members died and I could pick up/drag his gear normally without the need of putting it in my hands first. My squad member never left the server while I was looting him.

Yestarday (15.03.2017) my teammate shot 2 guys whose bodies disappeared INSTANTLY upon after the bullet dmg was registered and the player died.
We couldn't see the body in the vicinity and loot him as previous similar occurrences but this time my friend quit the server, then entered again and could loot their bodies. I did the same and the body showed up for me as well.

Off-topic.- There has been an increased amount of ONE-SHOTS where me and a friend of mine die instantly or fall unconscious from a single hit with a weapon while we have protective gear (ballistic helmets, gorka E, motorbike helmet), vests full of items, gorka jackets etc. I am not sure if it is a bug but I think its worth mentioning because I could get more info on whats upsetting me atm.