After meeting a group of players who told me to loot a place they have already went through I found several items (backpacks and clothing) with items within that I could not interact with. I couln't pick them up or put anything that was inside inside into my inventory or hands. Other items worked fine.
Some magazines even showed ammo inside (all other magazines were empty since the others took out the ammo) but as soon as I picked them up the ammo inside disappeared.