there seems to be some kind of graphics glitch where sometimes a weapon iam holding and dropping it on the ground to distract a guard dissapears and lands on the second level . literally sinks into the floor! for now its an issue i must grin and bear with it unless an update patch can fix this. games like hitman is not without some kind of bug
If you found a glitch, you can submit a ticket to the official support hub so that devs could track it more easily.