When clicking on Certain Recipes in the Recipe Book, you cannot stack items in the Crafting Grid. Recipes such as Spruce Stairs, Chests, and Bowls, will not stack any more then one set of blocks in the crafting Grid when clicking them in the Recipe Book.

This can be easily replicated by simply opening the crafting table, and spam clicking the spruce stair, chest, or bowl recipe icon in the Recipe Book.

1.21 Toggle Is activated. This affects 24w12a and 24w13a.