Tried to enter the cave at Lunnall River where "Parched Mites are abundant, only to discover I was unable to target them for attack due to “your vision of the target is obscured”, when there is no indicator, visual or otherwise, that would suggest these npcs are “obscured” in any way. Thankfully, I was on my BM hunter, so my pets could attack & kill them, all without any help (being allowed by the game) from me.