Endless Loop in Checkout

[DalbertHab]

Describe the bug The checkout fragments are being loaded in an endless loop.

To Reproduce Steps to reproduce the behavior:

1. Install Amazonpay & a plugin to enable "multi currency support" - we use Product Price based on Countries
2. Add a product to cart
3. Login with your Amazon Account
4. Proceed to checkout
5. The address fragment and the price fragment refreshes each other in an endless loop

Expected behavior After selecting an address of your amazon account, refresh the prices once.

Isolating the problem (mark completed items with an [x]):

• [x] I have deactivated other plugins and confirmed this bug occurs when only the extension is active.
• [x] I can reproduce this bug consistently using the steps above.

See https://wordpress.org/support/topic/endless-loop-in-checkout/

Env

• WP: 5.4.2
• WC: 4.2
• Amazon Pay: 1.12.2
• Price based on Countries: 2.0.8

[jessLundie]

We claim compatibility with Price Based on Country in our documentation here: https://docs.woocommerce.com/document/amazon-payments-advanced/#section-5

Additional information from forum thread - @DalbertHab reports the following:

I checked the diffs between 1.11.1 and 1.12.2 and found the relevant line:

amazon-app-widgets.js – line 427 – onPaymentSelect: wcAmazonUpdateCheckoutAddresses

These line is added in 1.12.x and causes the infinite loop (function calls in post 1).

As a temporary workaround, rolling back to Amazon Pay 1.11.1 resolves this issue.

[alexiglesias31]

Closing the ticket since the issue is not reproducible anymore.