The problem where the Demon of Lies could freeze mid death animation if killed with a scorpion, summoned creature or weapon with Frost was fixed in the latest
patch. I avoided Frost anyway, and didn't put any skill points into Stun until late in the game. At first I didn't realize Stun would come in handy, then my Nobleman's Sword had Stun on it. When I got to the wastelands I put points into Stun to use up some skill points, and ran into this problem with an occasional imp. I re-loaded and waited until I replaced the sword to max Stun again (my Sword of Gods had neither Frost or Stun).
