In opencart, a product from a category goes straight to the cart, why?

Question

opencart

Hello! Faced such a problem: in opencart 2.0 from the parent category, when you click on the "buy" button in the product window, it is immediately added to the cart, bypassing the product card. Although other products first open the product card, and then when you click the "buy" button there, they go to the basket. Why is this happening? Because of which? And how to fix it? Thank you in advance!