One of the ones I noticed is that when you use adrenaline on say, a horned frog, it would rather target a cockatrice. Because to the AI, the cockatrice has a bigger attack.
I used this deck to figure that out.
5bs 5bs 5bs 5bs 5bs 5bs 5bs 5bs 5bs 5bs 5bs 5bs 5bs 5bs 5bu 5bu 5bu 5c0 5c0 5c2 5c2 5c2 5c2 5c8 5c8 7ad 7ad 7aj 7ak 7b0
Another bug is where the yellow bar (Which shows the damage that will happen after your turn) on the green bar (Which is the health, obviously) is not affected by adrenaline. If you use adrenaline on a creature with 3 attack points, it deals 3 damage 4 times (12 damage). The yellow bar only notices the normal attack points of the horned frog. It only sees the 3 attack points the horned frog has.