HTML visible when you edit a topic comment/answer

Tested on local instance of XE 7.4.2

1. Create as Admin a forum and a topic for it.
2. Add a comment/answer to the topic
3. Click on the green icon from the right side of the comment/answer box and edit it.

Actual result:

• You get in edit mode, in the top and the bottom of the wysiwyg box:
  html clean="false" wiki="false"
  /html

Expected result:

• Hide this code in front.