I have my cart module in the left column. When a client starts payment the text is suddenly changed into: your cart is empty. This is very confusing, because they are in the middle of the order process. Is there a way to change this?
You could potentially not display the cart module during the checkout.
For that, set the option "force a menu on checkout" in the configuration and in the "menu assignment" option of the cart module, make sure that this menu is not selected.