Receiving error 'Source origin is not allowed in' on amp-list load-more using load-more-bookmark

## What's the issue?

I can't tell if this is a bug or if I'm doing something wrong.

I have a working amp-list implementation using server-side filtering at https://staging.caymanmag.com/work/finding-a-job, but I'm not able to get the infinite scroll to work with the `load-more="auto"` attribute and `load-more-bookmark`.

The Console error I'm receiving is 'Source origin is not allowed in' but I don't receive a CORS errors when not using the `load-more` attribute.

I wonder if it's due to the bookmark value: `load-more-bookmark="meta.pagination.links.next"` being used? It looks like the `&page=2` attribute is being added to the end of the query string.

## How do we reproduce the issue?

https://staging.caymanmag.com/work/finding-a-job

1. Before load more is initiated

2. After load more is initiated

## What browsers are affected?

All browsers

## Which AMP version is affected?

Powered by AMP ⚡ HTML – Version 1910071803120 https://staging.caymanmag.com/work/finding-a-job

Reproduce the failure at the staging URL with amp-list, load-more="auto", and load-more-bookmark="meta.pagination.links.next"; compare the console and network behavior with and without load-more. Trace the AMP version 1910071803120 behavior for the generated next URL and source-origin check. Done means identifying whether the bookmark-generated URL is rejected and documenting the required correction or configuration.

Written by the indexing model from the issue text.