Used a redeem code, but the assets isn't showing in my library

I bought an asset bundle on Humble Bundle — it came with 30 assets in total. I was able to redeem all of them using their codes, but there’s one asset that shows up as “in my library” when I search for it in the store, yet it’s not actually showing up in my library.

I’m wondering if this is a common bug with the site, because it’s been at least a day since I redeemed everything, and it still hasn’t updated to show that asset properly in my library. Does anyone know if there’s a fix for this?

I had the same thing happen, bought an asset bundle (probably the same one) and had several items not go through, even though the code showed as going through at the time and now shows as used.