Rift scuttler/smite

When you smite an enemy, you hear the sound of the smite. But if you smite one of the two rift scuttlers, it takes damage, maybe it dies, but you won't hear or see anything like a smite animation after patch 5.7 (i think its 5.7 :-) ). Maybe it's a bug, maybe not, I don't know. By the way, I'm sry for my bad english.