MeansOfProduction: Side effects can change the item in a way that can break stacked crafing.
If you click the result slot with a similar block in your cursor to the official result of the recipe, and then the recipe changes the result in the side effect, the block will be incremented with the official result, instead of the side effect result.
I'm adding a warning for when this happens and deleting the crafted items, but this should eventually be fixed in a better way.