Ivern Passive On Random Scuttle Spawn Shows Ability Unknown

A scuttle crab spawned with the ivern passive glow to it, and had the passive on it. Enemy team had an Ivern so didn't seem out of the ordinary. I hovered the effect and i remember it said like, "Effect unknown: or something like that and had "Ivernmanager03" somewhere on it. Just a weird little bug.