Toast corners are not transparent when a recipe preview is displayed and the cursor is not hovering on a recipe book entry

To reproduce:

1. Place a crafting table, open it and make sure the crafting book is open
2. /recipe take @p *
3. /recipe give @p *
4. /clear
5. Quickly right-click the crafting table and move your cursor away from the recipe book
6. Look at the toast's corners