Gallery Lightbox hidden behind image popup

I have added a CoBlocks Gallery with 2x side-by-side images. I selected the lightbox feature in the settings for the block. When I publish my page and click on one of the images a .jp-carousel-overlay appears for each (jp-carousel-6446 & #jp-carousel-6423). Only when you click the X to close this preview does the lightbox show behind it.

I added this code which fixed the issue of the double enlarged image previews however my screen is not scrollable anylonger – so I have removed the code.

.jp-carousel-overlay
{display:none;
visibility: hidden;
opacity:0;}

I contacted WordPress assistance who hae said it is a bug with the block and I needed to contact the plugin creator to find a work around.

PLEASE HELP ??

The page I need help with: [log in to see the link]