[GAMEPLAY] Nidalee's hunt mark not activating on unseen targets

I noticed that when I throw a spear at a target and hit a champion I do not have vision of, I gain vision of the target but the hunt mark does not activate. This means that I cannot leap to them or get bonus damage on Nidalee's takedown.

This only happens when I land a spear on a target I do not have vision of. Traps still give both vision and the mark.