Reminders in Windows Phone Silverlight 8.1

Reminders in my app Muslim Prayers works great on Windows Phone 8 and whenever the user clicks on any reminder it just launches the app.

I have updated my phone to Windows Phone 8.1 and this app works great.

However after redirecting my application to Windows Phone Silverlight 8.1; reminders do not launch the app by clicking on it.

I want to know if this is a known bug or am I missing something?

thank