Good evening, everyone!
This is not really a bug I believe but rather a stability issue. As @DayZDevs tweetet earlier today about possible server instability and desync/lag, I worried about having exactly that problem (knowing my bad luck sometimes). As it turns out, I indeed do have heavy item lag/server lag and desync problems. Items will be picked up, moved, removed from the inventory and similar after a few seconds at least and rubberbanding is a thing that happens almost always in the xperimental servers.