BigCommerce Developer - Custom Checkout page conflict -- 2

Job ID: 35596382

Budget: $30 – $250 AUD

We currently have a conflict with our custom theme BigCommerce checkout page not displaying state or province information in the drop down menu for new accounts and/or guest checkout.
This conflict may be related to latest update rollout on on BigCommerce?

Existing account holders are able to login at the checkout and are not affected by this conflict.

We are seeking quotes to review and resolve this conflict.
Related categories: HTML BigCommerce