I’m having an issue with the background shifting when opening Essential Grid’s “Fancybox” (at lease I think it’s fancybox–v3?) that they use. They might have changed–not sure. I had this fixed at one time, but things must have changed. You can see my issue HERE. It’s the bookshelf and is the only thing on the page. Every time the lightbox opens, the background shifts left (the same distance the hidden scroll bar would be, is my guess). When you close it out, it shifts right again.
I think it have something to do with the following classes, but I have no idea how to fix it.
.esgbox-container
.esgbox-is-open
.esgbox-can-swipe
As always, thanks for your help.