Hi David,
I tried this out - I copied the JS relevant to the popover button click to the popup core JS file you stated. I did this on our development site:
http://site-sitedev41113bpi-pwii0f84.srv.ravcloud.com/blog/wp-content/plugins/wordpress-popup/popoverincludes/js/popover-load.js
But this didn't fix the issue... What am I missing?