Blacking out content upon scroll in posts

Got the issue now. From what I see – it happens, when the page isn’t completely loaded, say, if you’ve got weighty images. At the same time – the interface in general is loaded, except for some certain imgaes, but still the scroll issue persists and it does show the content, but after a while, after showing black parts of the screen for some brief seconds.

I’ve seen other mobile sites which don’t have such an issue and thus I do consider it a bog flow of this plugin – not sure if can be fixed by having a Pro version.