When opening the recipe book you'll often come across recipes which you can and cannot make (colored in red). If you click on a recipe you can make, then click on a recipe you cannot make (colored red) and then back again on a recipe you can make it will use multiple source items without having pressed shift.

Steps to reproduce:

• /give @p log 32
• The recipe for planks should show up, as well as the recipe for a crafting table (and others).
• Click on the recipe of the planks, it shows 1 log to 4 planks.
• Click on an uncraftable recipe, for example the crafting table.
• Click on the recipe for planks again, this will now most likely use 2 or more logs as source while the result (planks) never show.