unchecked staging-taglib:checkbox does not work with backend

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: Master
• Fix Version/s: 7.1.0 Beta 3, 7.1.X, Master
• Component/s: Staging
• Labels:
  • UI
• Fix Priority: 4
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/59278

Page deleted in live site when deleting missing pages is unchecked

Steps to reproduce:

1. Add a blank site
2. Add two pages, page 1, page 2
3. Enable local staging
4. Delete page 2 in staging site
5. Click Publish to live
6. Switch to Advanced Publication
7. Make sure deleting missing pages is unchecked
8. Check page 1
9. Publish
10. Go to live site, check the page

Actual result:
Only page 1 displays.

Expected result:
Page 1, page 2 display.