After entering the postal code once in the shipping preview and choosing to paste it again, it sometimes occurs to make a null request to the zip code API.

The request is /api/checkout/pub/postal-code/null/postalcodenumber and returns a 500 error.

• Go to the cart and add a postal code;
• Click to change it and paste another postal code (or even the same);
• Go to the shipping step, and the address may be incomplete.

The user will need to click the "Calculate" button or hit the enter key, in some cases typing the postal code without inserting it.