Internal links not validating

Hi,
Internal links do not validate if front is on different domain than the wordpress admin.
I have my website on a domain like https://website.com and the wordpress on https://wp.website.com/wp-admin. When it validates doesn’t find any links, because they are on different domain.
I can see this on the JS code

publishpress-checklists-pro/vendor/publishpress/publishpress-checklists/modules/checklists/assets/js/meta-box.js:984
984:                     var count = PP_Checklists.extract_internal_links(content).length;

but the 3rd arg is not passed and always use the window.location.host

publishpress-checklists-pro/vendor/publishpress/publishpress-checklists/modules/checklists/assets/js/meta-box.js:456
456:         extract_internal_links: function (content, links = [], website = window.location.host) {

Not sure on the backend what will do also.

Is there a workaround or a way of to use 2 different domains for the checking of internal links?