I’m working with the Azure Notification Hub and a C# application. If I request all registered devices through Hub.GetAllRegistrationsAsync(0);, I see a number of devices.
Two of these devices, I’m focussing on. They have both the same tags. They are both Apple registrations.

However, if I send a notification to one of the tags both devices have, only one device get’s the notification.
If I do this through the azure “Test send”, also only one device is shown. It look likes it doesn’t recognize it’s own registration anymore. But it still shows up through the GetAllRegistrations call.

Any clue what could be the issue here?