When I open a pdf document the text loads just fine and I can scroll as much as I want without any issues. However, as soon as I tap on the screen to hide the options menu at the bottom of the screen, the text becomes blurry as if it stops loading it. As I scroll even more, the text disappears. It is no longer blurry but whole pages don't load. It seems to be a problem with Samsung devices. It doesn't happen with my xiaomi device.