Get RedactorX to use relative URL's for pages

All the URL’s added via RedactorX using the link button or via raw HTML are converted to absolute URLS e.g. https://somedomain.com/my-page but I want to have just a relative url like ‘/my-page’ instead for internal pages.

Is there a custom config value you can add to force relative URL’s ? Or are all RedsactorX links absolute?

If you manually enter a relative url in the marlkup (using the HTML editor) the domain name is still added to it anyway on the front-end when EE renders it. So I’m not sure if it’s something I can change in RedactorX or if it’s something EE is doing that can’t be overridden?