Shipping rates by Ajax API cart problem

Short description of issue

Shipping rates are not returned when a valid address (Bloomington, MN 55431) is entered for the first time. Changing the city to another value still returns no rates, but changing it back to the original city then returns valid shipping rates. The same address produces different results depending on the request order.

Link to Shopify Store

Reproduction steps

  1. Enter this link: countCAM4 – StreetLogic Pro
  2. Click PDF quote button to add to quote
  3. Filter shipping information: 9850 Girard Ave S, Bloomington, MN 55431
  4. Change the city from Bloomington to Minneapolis
  5. Change the city from Minneapolis to Bloomington again

Additional info

The form use Ajax Cart API and ensure it follow recommendation from documentation Cart API reference

What type of topic is this

Bug report