Paper was stuck and baked under the cheese. Very odd and never noticed it on previous orders. What would the paper come from?

I love Little Caesars and their defatted soy flour pizza crust dough and breadsticks (Crazy Bread). The Crazy Bread is vegan if you ask for it with no cheese. Better quality and freshness too, because

Food was cold not satisfied left food on the floor who sit food on the floor instead of handing me the pizza