Hey there!
I recently updated from 1.11 to the most current version of the plugin, and it seems I've ran into a bug that must have crept in at some point. When using the Skyrin-like additive traits mode, if I combine at least 2 ingredients with the trait CHANGE HP RECOVERY: 0 30 in their notetags, the first potion crafted works just fine, having 30 HP healing. However, if I then craft another potion, the next potion will have 60 HP healing, and then the next 90 HP, and so on. I'm guessing the trait is somehow getting stuck in memory, or something of that sort.
(As an added note, I'm incredibly happy to see that now more than just one item in a recipe can be a "wildcard", as opposed to needing to set the other item's ID's.)