When I call the resourcePromise method and an error happens my error handler doesn't get called. What happens is that the side panel appears with the detail of the error returned by the server but my handler is not called.

Am I doing something wrong or is there a bug somewhere?

Here the code I'm using:

    umbRequestHelper.resourcePromise(
        $http.post("/umbraco/backoffice/api/XliffTranslation/post", args),
        'Failed to request translation for content')
        .then(function (data) {
            $scope.error = false;
            $scope.success = true;
            $scope.busy = false;
            $scope.translationRequests = data;

        }, function (err) {
            $scope.success = false;
            $scope.error = err;
            $scope.busy = false;
        });