It crashes the game when the recipe book is open with this crash:
https://pastebin.com/zACtYw6c
EDIT: GitHub code has been updated, cause the Item.getItemFromBlock(Blocks.BREWING_STAND)), the brewing stand was mean to be planks, before someone points that out
ItemStack output = r.getRecipeOutput();
if (output.getItem() == Item.getItemFromBlock(Blocks.PLANKS)) {
recipeRegistry.remove(r.getRegistryName());
recipeRegistry.register(DummyRecipe.from(r));
}