When using the Autocrafting Station injunction with an ore-dict recipe that contains items such as filled buckets, which return empty buckets, a recipe can be set up which can give back free buckets even if none were used in the creation of the item

Example: Pam's HarvestCraft Heavy Cream recipe, which can either use buckets or "Fresh Milk", an item added by said mod. When the recipe is set to use Milk Buckets, but Fresh Milk is given, the Autocrafting Station will produce the Heavy Cream as intended, but also give back empty buckets.

Here we can see the recipe, with milk buckets

And here we can we can see me inserting "Fresh Milk"

And here we can see the empty buckets being given back incorrectly

And I included the recipe of "Fresh Milk" to show how it is possible to get this item without any buckets, as seen by the second recipe