Navigation to tabs

The preview is not restricted to being done in the same web browser instance as the server-side preview window (you can open the website's URL with the preview parameters on any other browser or even device). When a page is opened to be previewed, only this browser's tab will be part of the preview. Navigating to a different page (clicking a link) that opens in a different tab will not transport the session parameters, as they are only stored in the browser's sessionStorage, which is not shared between browser tabs.

This means you must remain in the same window and tab during a session, OR you must append the URL-query parameters from the preview again on the next tab.