The announcement banner subject and message of the main help center page can't be edited after adding new languages

Issue Summary

When a new language is added to the page Project Settings > Language Support, and if some translation is added to the help center announcement banner subject/message and the project specific announcement banner subject/message, it will become impossible for the project admin to edit the announcement banner of the help center page.

Environment

The bug was replicated on JSD 4.11.0, JSD 4.13.0 and JSD 4.14.0.

Steps to replicate

1. Create a new JSD project on JSD 8.11.0 (or any higher version)
2. Go to the main help center URL <JIRA_BASE_URL>/servicedesk/customer/portals
3. Click on Customize, add something to Announcement subject and Announcement message, and save the changes
4. Note that the Announcement subject and Announcement message fields are properly updated even after a refresh of the page
5. Click on the JSD project key under Popular to access the project portal page located at <JIRA_BASE_URL>/servicedesk/customer/portal/1
6. Click on Edit Announcement, add something to Announcement subject and Announcement message, and save the changes
7. Note that the Announcement subject and Announcement message fields are properly updated even after a refresh of the page
8. Now, go to the JSD project configuration and go to Project Settings > Language Support
9. Add a new language, for example, Nederlands
10. Click on the Nederlands language, and add a translation to everything, especially all the fields in the Announcements section
11. Go back to the Language Support Dashboard page, and notice that the status is up to date.
12. Turn on the option Available to customers for the Nederlands language
    
13. Go to the main help center URL <JIRA_BASE_URL>/servicedesk/customer/portals, and take note of the current announcement subject/message
    
14. Click on Customize, modify both the to Announcement subject and Announcement message, and save the changes
    
15. After you save the result, you'll see that the changes are reflected
    
16. Refresh the main help center page
17. Notice that the Announcement subject and Announcement message fields are reverted back to what they were
    

Here is a video showing exactly how to replicate the bug:
Screen Recording 8.14.0.mov

Workaround

Update announcement subject/message as per Customer portal announcement failed to be updated