They are actually working but they seem to land on an invisible surface high in the air...tested it on my server by building up under the airdrop. I managed to loot a couple. It would seem when they hit the invisible surface they continue to drop the graphics for the crate but not the physical crate. as long as you loot near the bugged surface it works.Not ideal but not totally broken.Another thing i noticed is when the crate hits the ground each person sees a different crate. They can be pushed all over the place but nobody else can see your crate lol.
Well, this explains that video I saw of some guys building a tower 400 meters in the air to catch them.