There are a lot of problems with applying Shade to minions for example in the video below
Link if embed is not working https://imgur.com/TTHkFrg
3 Death knights already have Infernal Shade applied to them. If I try to apply Infernal shade on the Wraith which does not have a shade on it, it will not target the shade and continues refreshing Shades on the death knights even though my cursor is on the Wraith (and its health bar also confirms this).
This same problem also happens with Dread Shade and is particularly annoying since I want to put Dread Shade on my Wraith (which gives it 45% more damage due to the Doomed Wrath node) but it simply autotargets a Deathknight instead.