Technical support required between REST API & WC Vendors Marketplace

Hello to WC Vendors Marketplace support team,

I have been working at optimizing (WPO) the following wordpress / woocommerce (built with Elementor): .

At https://mercadify.es, I am facing an issue on one particular aspect of wordpress REST API: pages connectivity.
The REST API seems to be working properly on posts, categories, users, etc…
On pages ressources, REST API will answer properly until 15 “pages” per page return.
But REST API throws systematically an error above 15 pages “per page”.

In order to reproduce the issue I am facing:

You can test yourself any REST API URL like the following:
– POSTS:
https://mercadify.es/wp-json/wp/v2/posts?per_page=20 is OK
https://mercadify.es/wp-json/wp/v2/posts?per_page=30 is OK
– CATEGORIES:
https://mercadify.es/wp-json/wp/v2/categories?per_page=50 is OK
– PAGES:
https://mercadify.es/wp-json/wp/v2/pages?per_page=10 is OK
BUT https://mercadify.es/wp-json/wp/v2/pages?per_page=20 is NOT OK

Upon troubleshooting, I found that the issue is related to plugin WC Vendors Marketplace.
While deactivating the plugin, I am not able to find any error above the per page 15.
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​Please refer to the short screencast: https://www.loom.com/share/3f1d98f758f1488082051d4107c65d50​​

Can you help here with deeper investigation?

Kind Regards,

Isidoro
Webmaster @ https://mercadify.es

The page I need help with: [log in to see the link]