close button / next & previous buttons don't show

Gallery works really well, but when you click on the image, it launches the lightbox, but the close button and the next/previous buttons only show once you’ve clicked on the image again. Is it meant to do that, as it feels a little un-intuitive.

http://theme.popsirens.com/wp-gallery-test/

https://wordpress.org/plugins/blueimp-lightbox/