Starting with Android Oreo, apps running in the background are shown via notification.
This applies not just to "Lysn," but to all apps running in the background.
You can disable such notifications by following the steps below.
>> Settings in your device - Notifications - Select "Advanced" in the upper right corner - Select (︙) button in the upper right corner - Select "Show system apps" - Select "Android System" from the list - Disable "Apps consuming battery"