Grim ward and quick cast

When i’m trying to cast grim ward through quick cast it hardly ever works. Even when i’m standing in a field of corpses it almost never seems to target one and actually cast it

Anyone find a way to fix this?

I’ve noticed alot of corpse targeting skills have been buggy and you have to have your mouse directly on the corpse for it to work. I stoped playing necromancer because of it since it makes corpse explosion too annoying to use.