Game between HaveFunPlaying vs NickleBolus

Leash of life on board with Isadora Stormrage adjacent to Hero.
On Turn 7, I played Embers of the Just on Isadora, I understand she doesn't get fire damage because of leash of life. However when I destroyed ember, I targeted her with embers for ability damage while not being attached to her but she was still immune.

I would like to get some clarification on this. Thank you.