Today date 3/30/2022 I've been using moon + Reader pro for years. I wanted to read a pdf ebook. When i scroll fast (vertical continuous scroll) it flashes back to page 1 then continues. If i try horizontal scroll, it will reset to page 1 visually and practically. I can't scroll more than 2 pages. It can't be used to read pdf file. Let me know if fix is available.