Azure Notification Hub registrations disappear when sending a notification

Question

Recently our Azure Notification Hub became a very mysterious entity. When Apple devices register we can see them in Service Bus Explorer and as soon as we try sending any no

Answer 1

Turns out the front end guys were unsubscribing too eagerly. Removing the unsubscribe code sorted out the issue. Also there was a problem with the APNS certificate, in order to run the front end app in debug it requires a sandbox certificate, not a production one, for the messages to be delivered properly.