I have two variants on a product, when I input a quantity and click Add to Cart on the product detail page, not changing the variants, the quantiy and unit cost are entered into the cart correctly. Click Continue Shopping, add another to Quantity and click Add to Cart - not changing the variants - the cart is updated with the Quantity but the Unit Cost is changed to 0. I was using Smith Cart 4.43, DNN 5.6.3.
I just updated to Smith Cart 4.48, DNN 6.0 and it still happens.