Wooglet witchcap glitched bonus stat

Says it gives 25% bonus AP in Twisted treeline and even though I had 384 AP, mine still said (0) bonus. Huh? I looked around and apparently this glitch is over 3 years old as I've seen the posts in NA servers as well. 3+ years and no fix? A question, even though it says (0), do you still get the bonus but it's not shown?
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