Lightbox feature overriden by forced URL of image

Hello Photoswipe Masonry/Dean Oakley. I have a conflict on my website caused by the premium theme that I purchased. What happens is that whenever I click on an image, it first opens the Photoswipe Masonry lightbox but it’s then redirected to the direct image url in full screen. It overides the lightbox. I did all the troubleshooting steps recommended on the plugin page and I was able to narrow it down to the theme itself, as the problem disappears when I use a default WordPress theme. You can see it happens here on my band website:
https://goo.gl/qcWzCM (shortened Google URL since I don’t want people searching for my band to find this threat in Google)

Here are some print screens showing what happens:
-This is my Gallery: http://prntscr.com/eskxkq
-When I click on an image to open it, it’s supposed to open in the Photoswipe Masonry lightbox like this: http://prntscr.com/eskxx1
-But the Shuffle theme forces the image to open to a direct URL (over-riding the lightbox) so it looks like this: http://prntscr.com/eskxpo

I contacted the premium theme designers hoping that they could give me a quick fix on disabling this forced url redirect and they want to charge me an exuberant amount of a few hundred dollars just to get me the code to disable it with. I’m just a small band so I really don’t see that as being an option for me, especially considering that I already paid for the theme to begin with.

Now I know that it’s not your job to customize and individually fix every single plugin user’s website. But I was wondering if you had come across a similar issue in the past and could give me some tips on how I could fix this myself?