Add another Item button in collections – not displaying in Opera

I ran into a small display issue when editing a collection item in Perch Runway where Add another item doesn't show up. The html in Opera reads

<input type="submit" name="add_another" id="add_another" value="Add another item" class="add button topadd" style="display: none !important;">

In Safari the html reads

<input type="submit" name="add_another" id="add_another" value="Add another item" class="add button topadd">

Wasn't sure if Opera uses for display: none for a reason. I can add a post by adding collection to App Menu and using +.

Summary Diagnostics are:

SUMMARY INFORMATION

Perch Runway: 2.8.29, PHP: 7.0.6-13+donate.sury.org~trusty+1, MySQL: mysqlnd 5.0.12-dev - 20150407 - $Id: 241ae00989d1995ffcbbf63d579943635faf9972 $, with PDO
Server OS: Linux, apache2handler
Installed apps: content (2.8.29), assets (2.8.29), categories (2.8.29), collection_2 (2.8.29), perch_blog (5.0), perch_forms (1.8.3), perch_kraken (1.0), collection_3 (2.8.29), perch_mailchimp (3.0.1)
App runtimes: <?php $apps_list = array( 'content', 'categories', 'perch_blog', 'perch_mailchimp', 'perch_forms', );
PERCH_LOGINPATH: /perch
PERCH_PATH: /var/www/html/perch
PERCH_CORE: /var/www/html/perch/core
PERCH_RESFILEPATH: /var/www/html/perch/resources
Image manipulation: GD
PHP limits: Max upload 250M, Max POST 250M, Memory: 256M, Total max file upload: 250M
F1: 2edba60ed1f613d6dd804feb202456a2
Resource folder writeable: Yes
HTTP_HOST: scottgruber.me
DOCUMENT_ROOT: /var/www/html
REQUEST_URI: /perch/core/settings/diagnostics/
SCRIPT_NAME: /perch/core/settings/diagnostics/index.php