This is the same issue as reported a year ago here:
dfactory.co/support/topic/fullscreen-and-vertical-scroll-bar/
Back then, Bartosz asked for a URL exhibiting the problem.
I noticed that the dfactory site exhibits the problem on the Lightgallery demo page
dfactory.co/products/lightgallery-lightbox/
presumably, that page is running the latest configuration.
My sites that exhibit the problem are all running the latest configuration:
WordPress 5.2.3
Responsive Lightbox & Gallery v2.1.0
Responsive Lightbox – Lightgallery v1.1.1
This happens on my Win 10 laptop and my Win 10 desktop, but not on my Android phone.
Screenshot from my Surface Book
i.imgur.com/oNu8M64.jpg
Screenshot from desktop
i.imgur.com/WlQ01yZ.jpg
