Am using the API to post issue comments, but supprised that bitbucket does not parse the html it just renders and posted like the picture below show

What is wrong?
Here is my api
content = {"content":{"raw":comment, 'html':comment}return self._post('2.0/repositories/{0}/issues/{1}/comments/'.format(self.ticket.bitbucket.repo_full_name, self.ticket.bitbucket_issue_id),
data=self.data, params=params)