[Zubersoft]

I'll look at any crash reports that were generated (make sure Settings->About->Enable Crash Reporting is turned on), but you can go to Settings->Display Settings and switch off "Utilize GPU for the annotation editor" if that's causing instability on your device. I have no idea why you are seeing annotations shift - I don't see that on any of my devices (PC and two surface pros). When you say "slider", are you referring to the page slider? 

Mike