To resolve the issue please follow the troubleshooting steps provided in the given links:
For Battery Drainage:
>Main menu--> Camera--> Setting of camera --> Reset of camera settings.
>Reset network settings (Scroll down notification panel >Settings >General Management >Reset >Reset network settings).
>Check your device issue in Safe mode.
For further assistance, register your concern in Samsung members app(Open Samsung members app>click on “+“icon>send feedback>Error report/ Ask Questions).
Team Samsung Members