Hello,
I have noticed that the following behavior,which happens in my wordpress installation, also happens in your demo(http://www.dfactory.co/plugins/responsive-lightbox/) when using Internet Explorer (for example 11):
Opening and browsing the lightbox works fine, but after you close the lightbox, the scrolling of the whole page does not work anymore,it always scrolls to top so one cannot use the page anymore.
Is there any solution to this problem?
Many Thanks in advance!