Items that been layed down on the floor/vicinity underneath a bush, seem to hover int that bush (in hights of about breast). If so, the can be seen, but dont appear in the hud nor be accessable anymore.
woraround: cutting down the bush solves the problem. Items still hover, but have the icon in the hud an can be taken.

same inside a tent. the items will hover on top of the tent. disemble the tent will solve this prob too.