I had this same problem, killed someone, they froze but didnt die, I could take their rucksake off them.but couldnt equip the backpack.... also couldn't take anything out of their hoody or trousers... very frustrating! Also started lagging randomly and I couldnt even open doors or houses.

I was about to say the same! Can not pick up anything they have on them, I have also killed multiple who have rucksacks on and you can't take that either... things have been added to the game which is great but they havent been made properly... quite frustrating when paying so much for a game.