Staging - Unable to comment on collaboration portlets on live page

• Type: Regression Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: Master
• Fix Version/s: 7.0.0 DXP FP50, 7.0.0 DXP SP8, 7.0.X, 7.1.0 Beta 3, 7.1.X, Master
• Component/s: Collaboration, Staging
• Labels:
  • liferay-digital-enterprise-70-sp8
  • liferay-fixpack-de-50-7010
• Branch Version/s:
  7.0.x
• Backported to Branch:
  Committed
• Story Points: 1
• Fix Priority: 4
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/59134

Unable to add a comment (ie: on blog, wiki, message board, etc) on a staging enabled site after the blog post has been published to live.

Steps to reproduce:
1. Add a staging site
2. Add blogs portlet
3. Add blog
4. Publish to live
5. go to live site
6. Click Comment

Expected Result:
Able to comment on blog

Actual Result:
No blog comment form present

Same behavior occurs when admin signs out, navigates to the live site as a guest and tries to add a comment to blog.

Reproduced on:
Tomcat 9.0.6 + MySQL 5.7. Portal master GIT ID: 62e789d9bbbd749075cb3ef988dea5807e2d65bc.