I am trying to read a long pdf that's located on my computer and synched up to OneDrive. Each time that I scroll down, the text either disappears, fails to scroll, or fails to scroll and then suddenly scrolls three pages and I'm lost as to where I was in my reading. Sometimes the text is cut in half and overlaid by text from a different location. It is impossible to focus when the text won't stay where it's supposed to be. Please fix this!