OK, this is basically because of the hide_title_on_empty_content method called in blocktype/lib.php:877 - if that method is implemented in a blocktype then render_viewing() will return nothing (not render a template at all). In master, only the Group pages and members blocktypes implement this (for some reason)
OK, this is basically because of the hide_title_ on_empty_ content method called in blocktype/ lib.php: 877 - if that method is implemented in a blocktype then render_viewing() will return nothing (not render a template at all). In master, only the Group pages and members blocktypes implement this (for some reason)