can’t see the credit card form if i change payment method

Hi everyone.
i’m using generatepress, woocommerce and woocommerce plugin for that website.
this is the problem:
when i go in my payment page, the”woocommerce payment” method is already selected, and work properly. if i change payment method, and i select back woocommerce payment method, it don’t charge the credit card forms.
the website is https://chrismart.it; the error is only in payment page, https://chrismart.it/pagamento. put a product in the cart, and test it.
for example, this https://chrismart.it/prodotti-natalizi-handmade/pallina-di-natale-nera-personalizzata-con-nome-oro/ put that in the cart, and try the payment method switch.