That’s quite unusual as the PHP snippet itself doesn’t mess w/ the WPSP post item’s links. WPSP’s post items should link to its single post page.
Can you let us inspect the site w/ the setup used on the video you’ve recorded? I’ve tried checking the site but it seems to have been changed as I don’t see any posts under the WPSP on the front page – https://share.getcloudapp.com/d5uNzp5q