There is a bug where you can be standing exactly next to one of these items and yet you cannot hit it, it takes some moving around to get in the exact sweet spot to be able to damage it like the collision detection is not working on our weapons and abilitys.
This makes it very difficult to attack the aforesaid item during hectic combat, when its a grave burrow for instance..
Tis not what they can do for you
Tis only what you can do for all