Vscode-ng-language-service: La referencia de plantilla a ngModel produce un error.

Dada la plantilla

<label for="name">Name</label>
<input type="text" class="form-control" id="name"
       required
       [(ngModel)]="model.name" name="name"
       #name="ngModel" >
<div [hidden]="name.valid || name.pristine"
     class="alert alert-danger">Name is required</div>

El servicio de idioma ng dibujará garabatos rojos debajo de name.valid y name.pristine con el error

[Angular] Identifier 'valid' is not defined. 'NgModel' does not contain such a member