Quest mode, Legendary difficulty, scenario power adds 2 to defeat villain for every henchman defeated. villain is Black Fang, Henchmen are Poison Traps. Party of four characters has defeated 2 Poison Traps when Lini (going last in a 4 person party) starts her turn at the Mountain Peak and is called to do a Wisdom/Survival 11 roll (rather than 7). As it turns out, the top card of the locatio deck there was the villain, so it looks like it incorrectly applied the scenario power to the start of turn check with the villain on top of the location check. If more info is needed to track down this bug, please let me know.

Sounds similar that Seelah bug where she can predict the next card...

So there is similar code Path bug here.