Slides flickering during animation

I’m getting intermittent flickering during the animation with this slide presentation I’m building on my staging site and I’m not sure what’s causing it. It’s happening on both Chrome browser on my desktop and on both Chrome and Safari on my iPad. Any ideas?

Here’s a link to the slide presentation in question.
http://galley6732.staging.wpengine.com/

https://wordpress.org/plugins/slideshow-jquery-image-gallery/