It came to PvP Action and one character died, when shooting him he seemed kind of laggy. Some seconds later this character stood next to his dead body. Both had the "loot the body" sign (to click "f" and see its inventory) but only the one on the ground were lootable.

In addition the standing body was doing the backwards walking animation, but not moving. Me, the one who took him down, were the only one seeing the second, standing body at all.

On the left hand side of the uploaded picture there is the duplicated character. {F32074}