Images not showing in Assets popout

Perch: 2.8.23, PHP: 5.6.11-1+deb.sury.org~trusty+1, MySQL: mysqlnd 5.0.11-dev - 20120503 - $Id: 3c688b6bbc30d36af3ac34fdd4b7b5b787fe5555 $, with PDO
Server OS: Linux, fpm-fcgi
Installed apps: content (2.8.23), assets (2.8.23), categories (2.8.23), perch_blog (5.0), perch_events (1.9.2), perch_forms (1.8.3)
App runtimes: <?php $apps_list = array( 'content', 'categories', 'perch_forms', 'perch_events', 'perch_blog' );
PERCH_LOGINPATH: /perch
PERCH_PATH: /home/forge/oldgeorge.youi.design/public/perch
PERCH_CORE: /home/forge/oldgeorge.youi.design/public/perch/core
PERCH_RESFILEPATH: /home/forge/oldgeorge.youi.design/public/perch/resources
Image manipulation: GD
PHP limits: Max upload 32M, Max POST 8M, Memory: 512M, Total max file upload: 8M
F1: dc1fef2ad0fcd9f943c02ebb43d85dbc
Resource folder writeable: Yes
SCRIPT_NAME: /perch/core/settings/diagnostics/index.php
REQUEST_URI: /perch/core/settings/diagnostics/
DOCUMENT_ROOT: /home/forge/oldgeorge.youi.design/public

It is on a large monitor (27") but only using half the screen space. I tried resizing to see if it changed anything but nothing worked. Is the Asset pane supposed to be a scroll function that loads more images via ajax? If so that isn't working, nor can I see any pagination controls (Although I can in the Assets header-link page).

I've put the browser window on my MacBook screen and it scrolls fine now, thanks.

Is this an external JS resource issue or within Perch's codebase?

Any ideas on a fix for this one?

Thanks

Thanks Drew