Just got the same.
I already got the Winter's Clutches from Esther so I wonder if that's somehow mucking it up?
I tried reloading and unequipping them and sending them to camp or placing them in the World so they're not in my inventory but in both instances I still got the blank reward so it looks like I'm stuck with one Winter's Clutches until Act 3
That is one bummer of a bug.
edit - (no mods by the way)
