[Bug] Shipping costs do not update correctly

[janekbettinger]

It seems like the shipping costs are not updated correctly once a product that requires shipping costs is removed from the basket and only products excluded from shipping remain. In that case, even for latter type of products shipping costs are charged.

Reproduce
I have two types of products:

• A – shippable resp. has shipping costs
• B – excluded from shipping resp. no shipping costs

1. Select a product of A and a product of B and "move" them to the shopping cart
2. Go to checkout and select shipping type
3. Do not submit order but cancel order
4. Go back to shipping cart and remove all products of type A so that only products of type B remain
5. Go to checkout again
   • expected behavior: no shipping costs are charged
   • observed behavior: shipping costs are still charged although shipping step does not occur in checkout process

My setup

• Contao 3.4.0-beta1
• Isotope 2.1.8

[aschempp]

This is a known problem in Isotope 2.1 (see #1055). Unfortunately, it is a by-design problem and we could only change it in Isotope 2.2. Basically, shipping is no longer shown in the cart at all, only in the checkout process.