What you were expecting to happen, and what actually happened?
Stunned Infernal King’s third trait ‘Immortal’ should not have triggered due to him being stunned. He was killed by a spell so he didn’t have chance to recover but resurrected anyway.
What are the steps to make it happen again?
Stun and then kill a triple traited Infernal King and see if it activates.
Do you have any screenshots or video you want to share with us so we can see the problem? Attach them to your post!
I do not.
While we’re at it, Gloom Leaf’s third trait ‘Thorns’ reads “Reflects 50% of skull damage” but when he’s is low health, i.e. 1hp, he’ll still deal 1/2 of the attackers attack back to him despite the actual ‘skull damage’ only being 1.