Embedded images are duplicated in CKEditor using IE11

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: Master
• Fix Version/s: 7.2.10 DXP FP1, 7.2.X, Master
• Component/s: Frontend Infrastructure
• Labels:
  • ee-ts
  • frontendQA_gap
  • liferay-fixpack-dxp-1-7210
• Branch Version/s:
  7.2.x
• Backported to Branch:
  Committed
• Fix Priority: 4
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/76199

Reproduction Steps:
1) Set up a portal with the property of 'editor.wysiwyg.portal-impl.portlet.ddm.text_html.ftl=ckeditor' in portal-ext.properties - and visit the test site via IE11 
2) Log in as admin and go to Web Content in Control Panel
3) Click on add new Basic Web Content 
4) In the CKEditor click on the 'Insert Image' button and select an image from the Documents and Media Library, click add

Expected behavior: 
The image is added once to the content.

Current behavior: 
The image is added twice to the content

 master