I had the ashera’s crafting recipe and wen to the blacksmith and right clicked and the recipe disappeared from my stash, but the blacksmith now doesn’t know the recipe. This happened on my seasons and non-seasons character. On non-seasons, the ashera and captain (higher level) are missing and on season the ashera is missing.
Not a bug.
In addition, after the patch, the old recipes will no longer be available to craft and all players will need to re-acquire these recipes by finding the plans again through Horadric Caches or by killing Odious Collectors.