Lightbox seems to work sporadically

My site is here.

The lightbox works when all the porfolio items are shown but when you filter them by category a few times and then click on one, it (sometimes) just links to the image and opens in in a new page.

Is there a way to make sure the lightbox works all of the time?

https://www.ads-software.com/plugins/awesome-filterable-portfolio/