So far, Magic Pages subdomains (e.g., jannis.mymagic.page) remained active even when a custom domain (e.g., www.jannis.io) was set on a Ghost site hosted on Magic Pages. This often led to confusion among users.
As of today, these subdomains will automatically redirect to the custom domain if one is set. This change improves the user experience by ensuring consistency in how your site is accessed. It also prevents issues where theme previews or other internal resources might not work correctly because the URL known to Ghost differs from the one opened in the browser.