ds_extras_process_page_title can remove the node title when using node_view

I have a custom page that displays several nodes using node_view. If I use the 'full' view mode when calling node_view then my custom page will show its title. If I use a custom view mode when calling node_view then my custom page will not show its title.

I tracked this behavior down to ds_extras_process_page_title() and its use of drupal_static. Commenting out both lines that use drupal_static('ds_page_title') (one in the process page title, one in entity view alter) results in my custom page displaying its title as expected.

#1660358: Search Display page title is removed by ds_extras module... is related, but the fix doesn't seem to handle this use case.

I have included some sample code that helps explain the scenario I am talking about. It also includes a patch-less workaround for anyone else that may be experiencing this problem.

function MYMODULE_menu() {
    
    return array(
        'test' => array(
            'title' => 'David Copperfield',
            'page callback' => 'MYMODULE_test_callback',
        )
    );
}

function MYMODULE_test_callback() {
    
    $ds_extras_hide_page_title = variable_get('ds_extras_hide_page_title', FALSE);
    
    // Uncomment and the page title will display.
    // $GLOBALS['conf']['ds_extras_hide_page_title'] = FALSE;
  
    // Change view mode to 'full' and the page title will display (if allowed).
    // Change it to another view mode and it will not.
    $items = array();
    $items[] = node_view(node_load(1234), 'custom_view_mode');
    $items[] = node_view(node_load(5678), 'custom_view_mode');

    $GLOBALS['conf']['ds_extras_hide_page_title'] = $ds_extras_hide_page_title;
    
    return $items;
}

My expectation here is that the page title options provided by ds_extras would only apply to the actual entity being rendered and not a global context. Without digging into the code too much it seems as though $page_title returned by drupal_static should be an array keyed by bundles and view modes.