Getting broken page after clicking on the next button in the embedded portlet while editing the page

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 6.2.X EE
• Fix Version/s: 6.2.X EE
• Component/s: WCM
• Labels:
  • ee-6.2.x-only
  • qa-b
• Branch Version/s:
  6.2.x
• Backported to Branch:
  Committed
• Fix Priority: 4
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal-ee/pull/15001

Description:
Getting broken page after clicking on the next button in the embedded portlet while editing the page. (Refer attached screenshot- next_page.png).
Steps to reproduce:
1) Extracted a clean instance of Liferay 6.2 EE and added search.container.page.default.delta=5 in the portal-ext.properties (optional).
2) Logged in with the admin user.
3) Added a page named "page1" and added multiple web content display portlet on the page.
4) Clicked on the "Add" link in web content display portlet and in the editor, clicked on the source and paged this code <runtime-portlet name="11" /> to embed the Directory portlet in the Web Content Display portlet.
5) Follow the step 4 for all the web content display portlet (adding this in 6 portlet will be enough, if search.container.page.default.delta=5 is set). In each web content display portlet, while adding the <runtime-portlet name="11" /> in source, please change the portlet ID.
6) Now edit the "page1" and clicked on the embedded portlet, here click on the next button.

Expected result: Next page should be loaded properly.
Actual Result: Broken page is appearing after clicking on the next button.

Test in ee-6.2.x (2a22ba3ddd031180aa0ae77a73e89e286ba25017): Reproduced
Test in Master: can not test, see comments.

End Goal: Page should not be broken and Next page should be loaded properly.