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Webflow Checkout Page Loads - Empty before populating

When I go try to go to check out - the page loads up empty and with the incorrect currency (see screenshot below) - this provides a jarring experience on the first load, it then populates the items/ content 1 second later. Is there a way to fix this or make it mores seamless? Thanks!

Website link - Checkout - Headon Boxing Academy

Same problem is happening to our company website. This is costing us sales!
I found this post talking about the same problem back in 03/2019

please help!
https://discourse.webflow.com/t/ecommerce-bug-empty-cart-at-checkout-with-no-shipping-method/86224/4