Mana flood with 21/60 card decks
Played 4 standard constructed games with a buddy. His deck has 21 lands in a 60 card deck. He has roughly a 1 in 3 chance of drawing a land. However, all 4 games we have played tonight to test it out, he has been land "flooding".
Game event numbers:
Other issues with yield/pause during in-game play but the flood is the primary concern. The shuffle/draw algorithm seems to have a bug.