Disappearing images

Hi,

I have use the plugin in my site http://comcomsol.in/ccc/. Landing page has a number of images. On clicking any of the image, lightbox starts showing the images and I can also start a slide show with the images available in the page. But a number of image from the page disappears after showing themselves in the lightbox. On page refresh, the images again appears. I have checked the page in Chrome, Firefox & Safari.

To recreate the scenario, after the page is loaded, click on the map at the top right corner of the page. Lightbox will appear with the map. Now you may scroll manually or click the play button above the image.

Thanks.

https://wordpress.org/plugins/lightbox-by-supsystic/