To allow the app to play Broadcastify feeds in the background and to prevent your device's power management features from interrupting the broadcast, please add the Broadcastify app as a power management exception.

You can do this by following these steps on your Android device

1) Open Settings
2) Touch "Apps & Notifications"
3) Touch "Broadcastify"
4) Touch "Advanced"
5) Touch "Battery"
6) Touch "Power-saving feature"
7) Touch "OK" at the pop up notification
8) Touch the "Apps" menu item at the top
9) Choose the Broadcastify app checkbox to enable a power management exception

That should prevent the phone from stopping the feed when running in the background now.