@Lbp54843 You shouldn't need any internet service to stream any of your downloaded content in Offline Mode.
Have you tried manually turning Offline Mode on?
To listen offline from a mobile device, you can use the following steps:
- Tap the Profile tab and then the Settings gear in the top right corner.
- Toggle Offline Mode on.
Once Offline Mode has been enabled, you will see only the content in your collection that has been downloaded for offline listening.
Let me know if you have any trouble with this.