Suddenly no Mill Decks After using a "saver"

Had to face a lot of Mill decks in Brawl.

Then i added one creature to the deck, which when it went to graveyard from anywhere it will be put back in libary.

Made like 50 matches After that. Not a Single Mill deck.

Before i had like every 7-10 matches.

Is the Algorithmus not allowing These matches now?

Anyone have experience in that?