On my Motorola Droid 4 when I move an APP from the phone to the SD card, example Flixster, and then if I power my phone down and back up the ICON on my screen changes from the Flixster Icon to a blank Icon. If I move APP back to Phone and cycle power again it comes back. Can anyone tell my why it does this and what I can do to try and correct this. I have already tried formating my SD card and have uninstalled and reinstalled the APP and it still does the same thing. This is happening with all of the my APP's that I am able to move from phone to SD card please help.