Since I installed SDK 8.1.0, the simulator sometimes resets the persisted data (like app settings) without cause.
In this case I get the following message on the debug console:
WARNING - persisted values reset due to settings redefinition.
This happens without any changes to the resource files.
I have observed it happening when setting the app settings with a device, and then restarting the simulator with the same device. So also different build rules in the monkey.jungle files for different devices could NOT be at fault here.