I'm playing around with Universal Apps for WinRT and WP 8.1 (not the Silverlight stuff).
As for the regular Windows 8.1 store app, the push notification from the azure notification hub works quite well and really fast (within a few seconds), I have problems when I push to my WindowsPhone 8.1 device. After connecting to the WNS-service (see http://azure.microsoft.com/en-us/documentation/articles/notification-hubs-windows-store-dotnet-get-started/#connecting-app) it works for about 15 minutes. After that, the messages don't arrive any more?
When I take a look to the Azure-Push-Debugger I can see that the message was sent to the push service correctly. The strange thing is, that push messages sent with the old fashioned way (MPNS+Silverlight) works pretty good either.
Is there anybody who can confirm this strange behaviour with WP 8.1 apps? Any ideas to solve the problem?
Thanks with regards, Phil