The Latest SP PageBuilder seems to have an issue with relative URLs when using subdirectories. I am working in a subfolder e.g. "example.com/new" and sometimes SP PageBuilder redirects to "example.com/index.php...". I noticed two specific reproducable times this happens:

• When creating a new page - Automatic redirect after Page Title has been entered
• When "closing" a page with in the menu in the upper right corner