Back in May, I was notified of the 6.01 upgrade for Marshmallow. I got so excited, I clicked 'yes' before I noticed I only had 63% battery left for the install! Now, before granting permissions for certain apps, I need to turn off the screen overlay option that's been detected by the OS. I turn it off and go back to the app permissions to turn on the appropriate permission, but I get the same dialog telling me to turn off the screen overlay AGAIN! Is this due to a partial install, or a bug that needs to be fixed?