It’s not technically a bug, but maybe some oversight in putting the collections together that should be corrected.
Both Chuka III and IV need a Lesser Vision Crystal, and Chuka IV needs a Heat Stone. Both of those things are not craftable with a Huntsman, while everything else in the collection (even the food and the milk!) is.
Could you please correct this? Lesser Vision Crystal is the more annoying of the two as you can’t buy it on the trading post.