It turns out this is an issue with the Render Preference: Speed PDF library. If you switch the render preference to Quality, the pages show up correctly. I just grabbed the latest version of the "Speed" PDF library, and it fixes the issue, so the next Android release will resolve this. The Windows 10 version of MobileSheets is using an older version of the PDF library (because they update that one less regularly) which doesn't exhibit the same problem.
Mike
Mike