Client noticed light boxes are loading opaque background only in Safari (on Mac). I tested via https://spoon.net/browsers and experienced the same issues.
That version of safari was from https://spoon.net/browsers as I don’t run safari on Windows (I believe it is the latest version 5.X).
My client originally noted the same issue on their Mac when reviewing a project I am working on for them. I have also noticed the same issue on other sites I have done through webflow (both with webflow hosting and exported code). The example above was a new site I created just to show the issue.