[Zubersoft]

I've been contacted a by a few users in the past that have encountered this same issue, but we were never able to figure out exactly what caused it. I'm happy to do everything I can to help investigate the issue though. You can try the following:

1) Switch the PDF render library under Settings->Display Settings->Render Preference to see if it changes anything
2) Try loading songs based on text/chord pro or image files as those use less memory than a PDF to see it's somehow related to that
3) Try turning off WiFi, bluetooth and 3g/4g to see if that has any impact
4) If you changed any settings on the tablet under the developer settings such as "Don't keep activites", you must revert those changes.
5) See if the problem is the same in both portrait and landscape orientation
6) Create a backup of your library and share it with me at mike@zubersoft.com so I can see if the problem can be reproduced on any of my devices
7) We can try having you install a new build to see if that runs any better. If that doesn't work, we can try having you install an older version again to see if the problem doesn't occur on that version.

If we absolutely can't figure anything out, it would then be time to try a factory reset on your device.

Mike