If they are in your inventory, just select the "text" version, and it will say on the left-hand side if it is a death stick or a healing stick.
Or, in the items screen, you can simply look at the items, and underneath the name of the item, it will show what type item it is. So even if if it called healing stick, it will say death stick underneath.
Those are bugs? But that method has always been around, and always applied to all entities in the inventory and item screen. Just click on "Items", and it will show you the type of item you're dealing with.
If showing the type item is a bug...well...that changes everything then.