Wooglet's Witchcap isn't displaying the bonus AP it gives.
I don't know if this applies to others champions or other players because I have only played one game of hexakill, but as I was playing Brand with the Zombie Brand Skin, I noticed the issue with the witchcap as I purchased it. I bought it prior to having full doran's rings and a rylais. It appears to only be a visual bug because I tested reselling the item and purchasing it again and it seems to give the right AP ratio, it just doesn't display the bonus it gives when you hover over the item, it just reads it as zero. (ex. icreases your ability power by 25%(0))