How to activate an activity using a local notification created from a remote notification

I have successfully created a local notification that starts an activity, but for some reason when this local notification is created from within the handler of a remote notification the activity is not started when the local notification is tapped by the user. No error or exception seems to be thrown.

Below is the code that creates the local notification. Note I'm using Xamarin. I wonder if it is perhaps somehow permissions related (remote notification handlers maybe cannot create intents to start activities?).

private void CreateNotification(string title, string desc) {
    var uiIntent = new Intent(this, typeof(ConversationActivity));

    var stackBuilder = TaskStackBuilder.Create(this);
    stackBuilder.AddParentStack(Java.Lang.Class.FromType(typeof(ConversationActivity)));
    stackBuilder.AddNextIntent(uiIntent);

    PendingIntent pendingIntent = stackBuilder.GetPendingIntent(0, (int)PendingIntentFlags.UpdateCurrent);

    var notification = new NotificationCompat.Builder(this)
        .SetAutoCancel(true) // Remove the notification once the user touches it
        .SetContentIntent(pendingIntent)
        .SetContentTitle(title)
        .SetSmallIcon(Resource.Drawable.AppIcon)
        .SetContentText(desc)
        .SetDefaults((int)(NotificationDefaults.Sound | NotificationDefaults.Vibrate))
        ;

    // Set the notification info
    // we use the pending intent, passing our ui intent over which will get called
    // when the notification is tapped.
    var notificationManager = GetSystemService(Context.NotificationService) as NotificationManager;
    notificationManager.Notify(1, notification.Build());
}