Oswin the Dread Warden

Hi all is it a EA bug that the skill book never seems to drop for the boss. I have completed the entire Interlude and have done this Boss prob a dozen times all new instances but the book never drops and while the boss marker on the map has the little X over the skull the reward still says "grants two skill points". Can anyone help with this? cheers o7

Same here: I killed the boss twice, but no reward. Oh well. maybe I'll have better luck on the next level.