IPad Gallery Next/Previous Issue

I have a gallery that can be seen on a website I just started building (please excuse the mess) . When clicking on a gallery thumbnail, you get the lightbox with the larger image. The next/previous buttons on either side of the image work fine on my desktop in Chrome, but when pressed in the Ipad’s Safari browser, they do not respond. I tried one of the galleries on your website and it worked fine on both the desktop and Ipad. Any ideas?

https://www.ads-software.com/plugins/envira-gallery-lite/