For example, the recipe of Marble Wall is the same as Marble Button, which consists of 6 Marble Blocks. I think the recipe of button is incorrect.
Refer to offerPressurePlateButtonRecipe method in BlockusRecipeProvider, which invoked createTrapdoorRecipe for button recipe.

Oops what a mistake ! I'll fix it right away
There was the same thing with the pressure plates

Thanks for reporting me this