Steps to reproduce :

• Open a dialog which has a sitemap in an iframe (such as the page selection in the content reuse module).
• Open a first level page, then a child page of it, this triggers the lazy loading.
• Select a page that was just lazy loaded.
• Now select any first or second level page (= any that was not lazy loaded) and validate.

The resulting path is not the selected page's but the third-level (lazy loaded) one.