The editing a comment process doesn't seem right

Steps to reproduce:

1. As an Admin or simple user add a new comment to an Answer
2. Edit it

Expected results: You can edit the comment.

Actual results: Once the user clicks on Edit, it is redirected to a new page where he can change the comment but once he clicks on Save comment a blank page appears. He has to go back to the forum > topic > answer > comment to see the changes.