1.16.2 Pre-release 1
Steps to Reproduce:
1. Download and install data pack.
--> See that the datapack contains an advancement that runs a function whenever the recipe "diamond" is unlocked. The function will take the recipe and play a loud noise.
--> See in
MC-187398, recipes are now unlocked when crafting them, meaning the advancement will run whenever you use the recipe. (A diamond into a knowledge book)
2. Use the recipe by putting a two diamonds into a stonecutter, and then crafting both into knowledge books, which should play a sound and clear the knowledge book.
--> X Observe that the second diamond does not unlock the recipe, and therefore does not clear the knowledge book or play the loud ghast noise.
This also applies to smithing tables. You can repeat the above process by combining two emeralds with two emeralds in a smithing table, and see the loud noise is (again) not played the second time.