I ran into a weird problem with the preview today. I am attaching an image of what i am seeing. Not quite sure how to explain it. But the preview is scrollable but only on the top 2 inches of the preview window section.
Could you tell us your browser, browser version and operating system of your computer please? We can then look in to this for you.
Firefox 56 x64 Windows 7 ultimate
Haven’t seen this issue before – can you reproduce it, or did it go away by itself?