The events’ mana buffs aren’t working properly, the events where all [colour] mana is full doesn’t fill for either the player or the 1st enemy, but then the 2nd enemy enters with full mana. This has happened since 3.1.5, in the 1-day and 3-day events.
Also, when the 2nd enemy enters battle, and I use Blightfire Fumes, it drains 100% of their “free” (start of battle perk) mana, but if they’ve charged it up normally, it only depletes it by the correct 45%
This is because that enemy’s full mana is fake. If you restart the game, the enemy will start with empty mana, and if you let the enemy take action it won’t cast its spells because the filled mana is a visual issue (the spells are really empty).