Text in Message Boards CKEditor disappears when browser is resized

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.0.X, 7.1.X, Master
• Fix Version/s: 7.0.0 DXP FP81, 7.0.10.12 DXP SP12, 7.0.X, 7.1.3 CE GA4, 7.1.10 DXP FP11, 7.1.X, Master
• Component/s: CKEditor
• Labels:
  • ee-ts
  • liferay-fixpack-de-81-7010
  • liferay-fixpack-dxp-11-7110
• Branch Version/s:
  7.1.x, 7.0.x
• Backported to Branch:
  Committed
• Fix Priority: 3
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/71426

The contents inside the CKEditor are removed when the browser window is resized. This was discovered while using the Message Boards portlet.

Steps to Reproduce:
1. Start Liferay
2. Add the following properties to portal-ext.properties if not set:

editor.wysiwyg.portal-web.docroot.html.portlet.message_boards.edit_message.bb_code.jsp=ckeditor_bbcode
editor.wysiwyg.portal-web.docroot.html.portlet.message_boards.edit_message.html.jsp=ckeditor

3. Add a Message Boards portlet to a page
4. Click on 'Post New Thread'
5. Type some text inside the CKeditor body
6. Resize the browser window to small size 

Expected Result: The content should remain in the Editor 
Actual Result: The content is removed after the resize

Reproduced:
 7.0.x eaa5b8136d8d11c8d6b34ce860c4be62d9ec7781
 master 5c27f0521d86f24bfa53a540d4f4665961c4187e