When mobs warp to you (Hezrous and reapers, perhaps more) they appear behind you and not in front of you.
This is a problem when you just started casting a spell before they warp since it will not land. However, it will cause cool-down on the spell. Maybe it is the same on non-instantaneous abilities I don’t know.
It would be great if the mobs could appear a few feet in front of the character instead so the spell or ability is not wasted.