Crucias, Titan of the Waves seek bug
I was playing ladder since it is the last day of ranking. I started around the place of 400 and then lost some games to fall out of the ranking. After my first loss I thought I missclicked with my Crucias. The card is designed to seek cards with higher or lower CMC than the discarded card. This feature is not working anymore after the update, which destroyed my deck completely. Normally I am able to seek my 6 mana removal spell with 100% accuracy, which is crucial. Due to the update, the seek was not working and I got the wrong cards which make me lose the game. Now I have no time to climb back into the top spots, which makes me lose out on the important qualifier invite or points. I linked pictures of the game situation and my rank before the lost games. I hope I get at least my points, since this was not on my deck.

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showman#80593 commented
I have experienced the same bug since the update
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actualNegate#71650 commented
Definitely introduced in ONE Alchemy update. Crucias discard Ambitious trigger behaves at random - discarding a 3 mana value with only 7 mana value targets can get a 3 mana value card, a 1 mana value card, etc.
I have logs with affected games from an Alchemy event and was able to reproduce against Sparky.