The same glitch where mats were gathered, I channeled at the hot spot, and poof, no mats nor buff. I made it successfully for the story, and 1 time thereafter, no success since. This last go around I did not complete all my Bitter Frost dailies and only did 2 hearts, will try again tomorrow after doing all hearts. My story is at Frozen Out, so if doing all the dailies fails will try with story completion and post.