Cannot create CSS Class when click the outside of field

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: Master
• Fix Version/s: 7.4.3.57 CE GA57, 7.4.13 DXP U60, Master
• Component/s: Pages > Page Editor
• Labels:
  • 7.4-known-issues
  • 7.4.13-u60
  • QA-AUTOMATION
  • liferay-ga55-ce-743-known-issues
  • liferay-ga56-ce-743-known-issues
• Fix Priority: 3
• Last Working Version:
  7.4.13 DXP U55
• Git Pull Request: https://github.com/liferay-echo/liferay-portal/pull/10591
• Bug Type: Regression Bug
• QA Test Name:
  • LocalFile.FragmentsWithCSSClasses#AddCSSClassToFragment
• QA Test Score: 5

Step to reproduce:

1. Add a Heading fragment to a content page
2. Navigate to the Advanced panel of Heading
3. Add a CSS Class for example, background-color
4. Click the outside of the field

Expected Results:
The background-color should be saved successfully.

Actual Results:
The background-color is not saved.

Reproduced on:
Tomcat 9.0.68 + MySQL 5.7. Portal master GIT ID: 5353897a43bf8630bbc59d2f6d03c1642bd64142.

Cannot be Reproduced on:
Tomcat 9.0.68 + MySQL 5.7. Portal 7.4.13-DXP-U55.