my page didn't load the images (or whatever) in any kind of timely manner, so i bailed on it before they loaded. was there more than just the one pop-up?
ultimately, this is what I thought might have happened. Reading it on a desktop had enough space that the down arrows were probably meant to indicate scroll on mobile, but showed all at once on the desktop experience. However, with all of the blocking that I have sometimes causes render/layout issues when people embed things, so I naturally just assumed something wasn't loading vs lame layout tricks