Unsubscribe button is displayed when user is already unsubscribed to comments and vice versa

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: Master
• Fix Version/s: Master
• Component/s: Collaboration, Comments
• Labels: None
• Fix Priority: 5
• Sprint: 010 - Caterpie
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/63168
• Bug Type: Regression Bug

Steps to reproduce:

1. Add DM portlet to page
2. Add a document
3. Add another user
4. Login as new user
5. View document

Expected results: Subscribe button displays when user is unsubscribed. Clicking on the button will subscribe user to comments on that document.
Actual results Unsubscribe button displays, hinting that user is already subscribed. User will not get any notifications if comments are added to this document. However, if the user clicks on this Unsubscribe button, it actually subscribes him because he will get the notifications regarding comments for that document. It will also change the button to Subscribe, which will give the impression that the user is unsubscribed.

Reproduced on:
Tomcat 9.0.7 + MySQL 5.7
Portal master GIT ID: 6cea080d0b4fbee2a08e2736819cad732337b5f0