If the "Now Playing" notification is no longer being added to your device's notification tray when you're listening, check to make sure your device hasn't been told to never show the app's icons.
To do that, follow these steps:
- Go into your device's Settings area
- Select "Apps"
- Select "Scanner Radio" or "Scanner Radio Pro"
- Select "Notifications"
- Make sure the "Block all" (or a similar sounding setting) isn't turned on.