Dash Hopes - When playing against ai, the ai will sometimes pay the 5 life, but their spell will also get countered.
Azorius Charm\
Boros Charm\
Kolaghan's Command - For all three of these, I had no problems with ai using them until latest update. Now when ai uses them, the stack shows the name of the card with nothing else, and then nothing happens. The ai is however able to draw a card with azorius charm and make permanents indestructible with boros charm, but every other option ai picks for these three cards don't do anything anymore.
Phyrexian Obliterator - Ai recklessly blocks, attacks, or burns him when I have Obliterator on field. Ai doesn't understand how to treat this creature.
Abyssal Persecutor - Kind of same issue as Obliterator with ai not understanding creature. Won't block, even when about to receive fatal damage. Should be assumed that this creature will not be staying on battlefield for long after enemy is at 0 or less if a deck is using it.
Detention Sphere - Ai targets its own permanents only when I have no nonland permanents, then selects the no option because of the may exile text, and so nothing happens and it dropped the d sphere for nothing.
Stir the Grave - Not a bug, but I noticed how
Postmortem Lunge allows you to select the card directly from the graveyard then gives you the cost instead of making you select x first, making the former a faster and more convenient way of selecting creatures, eliminating the step of selecting x