Plugin not working on larger screens and larger display resolutions

Hi there,

I spoke to Maharshi over chat and there is an issue with larger screens and higher display resoltions. We have problems with Firefox and the following screen resolutions:

2880×1800 / 2560×1440 / 5180×2880

Video here: https://www.dropbox.com/s/6zyc6cg79biydge/Video%202018-06-28%2C%2013%2039%2007.mp4?dl=0

The Gallery is loading but when I refresh the page it’s no longer working only when I resize the screen.

The page I need help with: [log in to see the link]