Probably less of a bug, and moreover an unintended win outcome, but if you stunlock the Ziltraps in the Penny Quest and defeat them, they not only do not release enough spores to max out Penny's lust, but the game continues on as if Penny's lust was maxed out. Can't provide screenshot, but what can be done to replicate this is to max all stats(naturally), and bonk the Ziltraps til they drop.