When I put loot onto the ground it tends to take a while to show up.

Example:
I'll put my ammo box on the ground to put ammo into it
It disappears for probably 45 seconds, then shows back up
After that, when I put the box on the ground it works fine.
Other loot also takes that amount of time to show up the first time.

This makes it difficult to look and change gear in a hurry.