So, the bug is about the recipe book crashing the game if a piece (or multiple pieces) of the recipe aren't present.

What I expected to happen was...:
As in the stable versions, to add a transparent, red background version of each missing item to craft the recipe.

What actually happened was...:
The game just gave up and crashed when clicking the recipe.

Steps to Reproduce:
1. Unlock a recipe, any
2. Get rid of all/a few of the required items
3. Enter the recipe book and attempt to craft it by clicking on the recipe entry.