[Zubersoft]

The only thing that could have caused this was MobileSheets getting into a death loop where it ran into a critical error while reading a PDF file, then tried to reload it. If even one page of the PDF fails due to a critical, unrecoverable error, the only thing MobileSheets can do is try to reload the file, as the PDF library is messed up pretty badly by errors of this type. It's pretty rare for this to happen, but you should see if you can load each of the songs individually, and see if any of them exhibit this behavior. The other thing that can cause this behavior would be if your tablet ran out of memory while trying to buffer the pages, and it kept happening over and over.

The next update will include more fixes for reading PDFs, so hopefully this problem should be addressed.