UI Bug with Level 1 Bonus Attack Speed

A while back you gave some melee champions some bonus attack speed at level 1 (e.g. Amumu).

However, as of a recent patch, this is no longer appearing as Bonus Attack Speed within the UI - and just appears as an inexplicable increase in attack speed.

https://i.imgur.com/Wo8zBZ1.png

Either the bug is with the Bonus AS percentage, or there's a whole line missing explaining where the bonus is coming from. I'm inclined toward the latter, since Stormrazor and Yasuo's Q cooldown isn't affected by the invisible bonus -however, the fact it's an invisible bonus is a problem.