I don’t know which one is bugged or both. In Standard: a Warrior found Ashamane (with Marin) and got all the buffs of Kil’Jadean; later when I used Vanish (found with Dreamplanner Zephrys) the Warrior got the cards with the buffs but I didn’t.
That gave a massive advantage to the opponent, which flipped the outcome.
[Solved(not a bug)]: It’s Ashamane was probably working correctly, and the Warrior probably used Ashamane cards the second time.