I am using Android-x86 6.0 on VirtualBox. Since I have changed the screen resolution using the method described here: https://stackoverflow.com/a/8273560/6110243 Android restarts whenever an open app is exited through the home or back button. This happens for every application, system apps and user apps. I can still use the back button to navigate within an application, but once the back button closes the app it instantly shows the "android" logo and boots back up.
I suspect it might be because my battery level always shows "0%" (and charging) and it somehow triggers a shutdown when an app is closed? But that wouldn't explain why it only started happening after I changed the resolution from the standard resolustion to 600x800x32. I have tried to set the Battery level to something higher, but couldn't find any Information on how to do so.