Revert sort direction of Document and Media fails in display page template

• Type: Regression Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: Master
• Fix Version/s: 7.4.3.11 CE GA11, Master
• Component/s: Page Templates > Display Page Templates
• Labels:
  • QA-AUTOMATION
  • liferay-update-dxp-7-7413
• Fix Priority: 4
• Last Working Version:
  7.4.13 DXP U5
• Git Pull Request: https://github.com/liferay-echo/liferay-portal/pull/7093
• QA Test Name:
  • LocalFile.DisplayPageTemplatesWithMapping#ViewMappedImageAfterSortDocumentsInDisplayPageTemplate
• QA Test Score: 4

Steps to reproduce:

1. Add a site
2. Add a display page template with Document content type and Basic Document subtype
3. Add an image fragment
4. Map image fragment to Basic Document > File URL field
5. Add a document and media widget under it
6. Publish the display page template and mark it as the default one
7. Add a basic document
8. Add a content page
9. Add a Asset Publish to page
10. Click the created document
11. Assert page redirects to display page
12. Click Revert sort direction icon in Dcoument and Media

Actual result:
Fail to load image frgament, "An unexpected error occurred." displays in page, and there's also error in console:

2022-01-28 09:21:03.351 ERROR [http-nio-8080-exec-7][FragmentRendererControllerImpl:126] Unable to render content of fragment entry 0:java.lang.NullPointerException

Expected result:
Document loads both in Image and Document and Media.