During the purchase process, if the customer adds an item that has already been included in the cart previously and the new inclusion has assembly options, the second item is not added to the cart.

For example, if during the purchase process, the customer adds an SKU to the cart and then another unit of the same SKU but with an extended warranty (via assemblyOptions), the last item added (the item with an extended warranty) will not be available in the cart.

To run the simulation, please make sure there are items with assembly options in your store.

1. Access the store;
2. Add a product to the cart;
3. Add the product once again and include an assembly option to the item (a customization or an extended warranty, for example);
4. Check the cart and verify that the item with the assembly option has not been added.

There is no workaround available.