Incorrectly States "Please Specify Shipping Method" at Checkout

[pioneerathletics]

Preconditions (*)

1. Magento vers 2.1.15
2. ShipperHQ vers 20.21.2

Steps to reproduce (*)

1. Login as a customer
2. Add product to cart
3. Go to checkout
4. After address is confirmed, hit the "Next" button

Expected result (*)

1. Checkout should progress to the payment screen

Actual result (*)

1. Message appears to "Please Specify Shipping Method" even though the only shipping method is already selected. (see screenshot)
   

2. Only happens when logged in as a customer.

3. Checkout can only proceed after selecting the shipping method again, but this could lead to confusion amongst our customers since the method was already selected.

[wsajosh]

@pioneerathletics Thanks for getting in touch.

We've been unable to replicate this issue on our development environments. Can you grab the request and response please and send it over via our support email address.

http://docs.shipperhq.com/using-the-webshopapps-logger-in-magento-2/