Open popup programatically

[3ynm]

I'm trying to open popup on drop, but it does not work, I've tried with

$scope.$on('leafletDirectiveMarker.dragend', function(event,args){
   args.model.focus = true;
});

and

$scope.$on('leafletDirectiveMarker.dragend', function(event,args){
    $scope.markers.forEach(function(marker){
        marker.focus = false;
    });
});
args.model.focus = true;

But popup does not open until I drag and drop the marker for second time.

That's not how it should work, how can I achieve this?