The issue you're experiencing with the lock screen wallpaper appearing incomplete after unlocking the device when using a third-party theme is due to a software compatibility issue. To resolve this, we recommend updating your phone to the latest OTA version. Software updates include bug fixes and optimizations that can address such display-related issues, especially with third-party themes. Once the update is installed, check if the issue persists. If it does, please consider resetting the lock screen wallpaper or try using a different theme. Thank you for your continued support!