Injecting error deletes value on change

[Zundrium]

Whenever I use a $broadcast with schemaForm.error.:
$scope.$broadcast('schemaForm.error.name','usernameAlreadyTaken','The username is already taken')

The key name in the $scope.model object becomes undefined when I change the value in the input.

However, when I switch the error off with:
$scope.$broadcast('schemaForm.error.name','usernameAlreadyTaken',true)

The error becomes a 'required' error and when I type and change the value in the input, the value is bound again in $scope.model.

Is this a bug or am I using the $broadcast wrong?

[Anthropic]

#642 is reported as fixing this issue

[LeonardoGentile]

It doesn't seems this is 100% fixed.
Using the development branch, this is what I do:

if (form.$valid) {
    var data = angular.copy($scope.model);
    $http.post(path, data)
        .then(function(response) {
            console.log(response.data);
        })
        .catch(function(responseError) {
            $scope.$broadcast('schemaForm.error.title', 'rejected', 'The username is already taken');

            var unregister = $scope.$watch('model.title', function(value, oldValue) {
                if (value != oldValue) { // from now on $scope.model.title will always been undefined
                    unregister();
                    // Reset the error
                    $scope.$broadcast('schemaForm.error.title', 'rejected', true);
                }

            });
        });
}

I'm watching changes in the model field that caused the async validation, and if the value has changed just reset the async validation.
The problem is that (similarly to @Zundrium) after setting the field 'title' as invalid the $scope.model.title property will always be undefined

[Anthropic]

@LeonardoGentile in the example you have model1 instead of just model for the watcher, is that how it is in your app or a typo in the example?

[LeonardoGentile]

That was a typo, I corrected it.
I think that it is an angular default behavior to set the model value as undefined if it is not valid.
I made the previous example work by passing this attribute to the form directive in the html

sf-options="{ formDefaults: { ngModelOptions: { allowInvalid: true } }}"