- Put an item in your hands. It must be an item unique to your inventory, and not a weapon that can be holstered on your character(I originally had the issue while holding binoculars with full inventory).
- Climb a ladder, you don't have to go all the way up, simply mounting, and dismounting the ladder will cause this issue.
-After dismounting your hands will appear empty. The item will either be in your inventory, or on the ground if your inventory was full. You will be unable to put the item back in your hands, or any other item.