Some cards are not played by the AI

[alexquest3]

Recently I created some decks for AI, mostly control and anti aggro, global removals and etc. I put it in demo mode to see, and the AI ​​simply has the card in hand, has mana available and doesn't play the card... an example is the emergent ultimatum card, I ran about 10 games each deck and I always come across the same situation , same with blood in the snow card.
What can it be?