We've been using remote push notifications from a gateway to allow us to provide auth information.
In some cases there's no sound to tell the user that a notification has arrived.
In our code we specify UNAuthorizationOptionSounds, and the notification settings on the devices are set to allow notifications and sounds for the application.
The client code hasn't changed in a couple of years, so I'm wondering whether something might have happened from the sending side. That's not my strongest area though.
Does anyone know whether there could have been a change in the call generating the push notification which cut off the sound, and where I would look for documentation on that?