So if your using backpack plugin and it drops on death it gets stuck in the gravestone. when it is like this it makes the backpack unlootable. this is not a consistint problen and it seem to happen to some players more often then others. here is a pic of the this situation. 

This is what my config looks like. I have added this because there does not seem to be a way to brake the gravestones with out having C4 or sachel.

{
  "GraveStoneDespawnTimeInSeconds": 1800,
  "OnlyOwnerCanDamageGraveStone": false,
  "SpawnGraveStoneInAuthZone": false
}

It looks like both backpack and PlayerGravestone spawn on the same location.
PlayerGravestone spawn

Vector3 playerPos = player.transform.position;

Backpack spawn "well I think"

public DroppedItemContainer Drop(ulong userId, Vector3 position)

Here is a pic of the this situation.

Why you find all these bugs!?!?

Alright, I will see what I can do, I will most likely just  teleport the gravestone a few feet to the side when it spawns.