Ayyubids - 4th Wing (Post-Imperial) + Economic Wing: Growth - You get 0% bonus to villager gathering rate if you get Growth as your 4th House of Wisdom Wing

For Ayyubids, you can get all 4 Wings at the House of Wisdom Landmark. The first three Wings are for Feudal, Castle, and Imperial Age. The 4th Wing is the Post-Imperial one you can get for more bonuses.

If you get the “Economic Wing: Growth” as your 4th Wing, the description says “all villagers work 10% faster”.

However, you actually get 0% bonus to villager gather rates.

That unfortunately makes that Wing completely useless.

It does work correctly, though, if you get it as your 3rd (Imperial) Wing.