There are two issues here really. Issue 1: when clicking off the lightbox a double scroll bar appears that wasn’t there prior to opening the lightbox. The fix I found for this was to set the overflow-y to hidden on the html element. This worked, however I have noticed that this fix causes a new issue. Issue 2: page does not scroll in Chrome browser on a mobile, possibly just Android as I haven’t tested it on any other device.
I am using BeTheme with the (I believe) nicescroll scroll bar.
Any ideas on how to fix these two issues?