Scaling image using Imagick Module
Yes, this module has a critical error for your problem. A week ago an issue was opened and need to be revived. But you can add your own patch to the module by yourself.
Here is the issue and solution for Drupal v7:
https://www.drupal.org/project/imagick/issues/3026933

and you can apply to Drupal v8 under file imagick\src\Plugin\ImageToolkit\Operation\imagick 

protected function process(Imagick $resource, array $arguments) {
    $color = $arguments['HEX'];
    $color = empty($color) ? 'none' : $color;
    //return $resource-&gt;colorizeImage(new ImagickPixel($color), 1);
    return $resource-&gt;colorizeImage(new ImagickPixel($color), 1, true);
  }