In the Concrete5 eCommerce shopping cart we customized the add to cart feature on a site so that calculations could be based on square feet. That worked without issue for over a year and just recently when you add to cart the dialogue box appears for 1/2 a second and then you are redirected over to the product list page. Items are added to the cart but the cart does not stay open. No changes that we are aware of were made to the shopping cart functionality so something else that has been changed is influencing the cart. We are looking for someone with javascript and Core Commerce experience help us troubleshoot this issue.