Breadcrumbs not showing

Im including the default breadcrumbs.html template in my post.html template. The blog post is rendering <ul> <li> fine, and showing the background grey box its styled in, but it fails to output the pagePath and pageNavText

My include:

 <perch:template path="navigation/breadcrumbs.html" />

Perch: 3.0.6, PHP: 7.1.1, MySQL: mysqlnd 5.0.12-dev - 20150407 - $Id: b396954eeb2d1d9ed7902b8bae237b287f21ad9e $, with PDO
Server OS: Darwin, apache2handler
Installed apps: content (3.0.6), assets (3.0.6), categories (3.0.6), perch_blog (5.5.1)
App runtimes: <?php $apps_list = array( 'content', 'categories', 'perch_blog', );
PERCH_LOGINPATH: /perch
PERCH_PATH: /Users/andrewmurphy/Documents/sites/05creative/public_html/perch
PERCH_CORE: /Users/andrewmurphy/Documents/sites/05creative/public_html/perch/core
PERCH_RESFILEPATH: /Users/andrewmurphy/Documents/sites/05creative/public_html/perch/resources
Image manipulation: GD
PHP limits: Max upload 32M, Max POST 32M, Memory: 128M, Total max file upload: 32M
F1: 0c66c2e1f82f9e0b7617b2cb8270f2c7
Resource folder writeable: Yes
HTTP_HOST: 05creative-site
DOCUMENT_ROOT: /Users/andrewmurphy/Documents/sites/05creative/public_html
REQUEST_URI: /perch/core/settings/diagnostics/
SCRIPT_NAME: /perch/core/settings/diagnostics/index.php