In Underdark abandoned village with the slave traders, managed to make perception check and succeed in convincing will help. Decide to kill em since myconids asked nicely so toss a barrel of oil down by boss then an alchemist pot. Boom, game instantly crashes. Try again but fail perception this time, throw out some grease and try to burn the zombies he summons. Boom, instant crash. Basically any time I try to explode something with oil, gas, barrels, or whatever the game in that area insta crashes and ends entire process in an instant. And I've done much bigger explosions before and had no trouble so is not my system.
