Deselect the linkit target checkbox CKEditor not remove target attribute from source code

When we deselect the checkbox of “Open in new window” from linkit popup window (linkit module), The target=”_blank”

is not removed from the source code of CKeditor. 

<p><a href=”#” target=”_blank”>Test</a></p>

Drupal version: 


Source: https://www.drupal.org/taxonomy/term/4/feed