API method Toolbar set to false don't show the content of the ng-model

[HBO2]

When setting the "{toolbar: false}" in the redactor directive in a textarea resultin a unexpected behaviour of not showing the the content of the ng-model.
Using the for example redactor= "{air :true}" in the textarea is functioning like expected and showing the data of the ng-model. And the air toolbar will show after the normal double click.

Any idea's