ng-repeat not updating information after $scope was updated

I have an ng-repeat which creates a form with some starting data. Then the user is free to modify said data and the changes should appear in the form. Before that, the user submitted data are sanitized by another function, which is called by an ng-click on a button.

Everything works well under the hood (I checked my $scope.some_array, from which ng-repeat takes the data and the new data is in the right place) but nothing happens on the page.

The element:

<li ng-repeat="field in some_array" id="field-{{$index}}">
            <div class="{{field.field_color}}">
                <button type="button" ng-click="save_field($index)">done</button>
                {{field.nice_name}}
            </div>
            <div id="field-input-{{$index}}">
                <input type="text" id="{{field.tag}}" value="{{field.content}}">
                <label  for="{{field.tag}}">{{field.nice_name}}</label>
            </div>
  </li>

save_field code:

$scope.save_field = function (index) {
        console.log($scope.some_array[index]["content"])
        var value = $("#field-" + index).children("div").children("input").val()
        var name = $scope.some_array[index]["name"]
        var clean_value = my_clean(value)
        if (norm_value === "") {
            retu
        }
        $scope.some_array[index]["content"] = clean_value
        console.log($scope.some_array[index]["content"])
    }

On the console I see:

10.03.16
10/03/16

Which is right, but in the form I only see 10.03.16. I already tried putting $timeout(function(){$scope.$apply()}) as the last line of my function, but the output is still the same.