Crycochrone helmet recipe essence amount

The Chryochrone helmet ( https://www.dofus-touch.com/en/mmorpg/encyclopedia/equipment/14088-cryochrone-helmet ) takes an unusually large amount of count harebourg essence. It takes 4 for the craft. It is the only item I have found that takes more than 1 count harebourg essence.

I am assuming that this is a bug because of the recent update that changed lots of recipes. It is possible that this is intentional, in that case you can disregard this post.