Some users have experienced an issue where any Golden Keys and / or customizations saved on their profile are missing after logging into the game. To avoid this issue, always make sure to choose "Save & Quit" from the pause menu before turning your console off. Also, ensure that you allow SHiFT to finish authentication before exiting the title screen.
If you are missing items and need them restored, please submit a support ticket at: http://support.gearboxsoftware.com.