I had full inventory, I drop my weapon on the floor to detach my glowstick from the backpack and put it on my hands to activate it, then equiped to the backpack. Wen I try to grab my weapon back, I culdent. I drop a weapon from my shoulder and try to equip it, and it gets equip on the shoulder. Now I try to pick up the other gun from the ground and still I can't. Re-loged, and the glowstick was on my hand I equip it on the backpack and pick up my gun.