Game Mechanics: Vampiric Embrace proc range

[Zeelot]

The proc on vampiric embrace doesn't go off and gives the message 'you are out of range get closer' when fighting larger NPCs unless you literally stand right underneath them. I have noticed this on giants and every large NPC in posky/hate/fear such as Essence harvesters, Ashenbone Drakes, etc.

I'm not sure if this is occurring with other types of procs, but I believe the proc range should be the same as melee range.