stark vessel
Not sure if this counts as a bug but I don't think it's intended/fair. If you use a card to reveal face down cards (for example you're on the boss that draws your first hand facedown and use a convert to x suit tarot card) on game speed 4 it goes by too quickly to really see what the cards revealed are.
I understand it's because you're raising the game speed so much but I don't think it's really fair because a lot of people who play a lot would prefer to play on game speed 4 but since this exists it just puts you at a strategic disadvantage vs. playing on any of the lower game speeds.
reef comet