Asset Thumbnail not working in Search Results

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.1.X, 7.2.X, 7.3.4 CE GA5, 7.3.X, Master
• Fix Version/s: 7.2.10 DXP FP12, 7.2.X, 7.3.7 CE GA8, 7.3.10 DXP FP2, 7.3.X, 7.4.0 CE GA1, 7.4.13 DXP GA1, Master
• Component/s: Web Search > Search Widgets
• Labels:
  • backend_test
  • ee-ts
  • liferay-fixpack-dxp-12-7210
  • liferay-fixpack-dxp-2-7310
• Branch Version/s:
  7.3.x, 7.2.x
• Backported to Branch:
  Committed
• Fix Priority: 3
• Sprint: Search_21_Sprint-2|1.25-2.22, Search_21_Sprint-3|2.22-3.15
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/99579

When using Card Layout as display template in the Search Results Portlet, it is expected to have asset thumbnails being displayed in the results. But it seems that this feature is not working.

Steps to reproduce:
1. Go to tree pages > public pages > search
2. Go to configuration page of the portlet Search Results
3. Set display template as Card Layout
4. Create a new document in Document Library section
5. Upload an image as document. (I tried with .png)
6. Publish the document
7. Go to home and do a search by some keywords that match with the document

Expected: Results being displayed with the document thumbnail
Given: Results were displayed with the default thumbnail icon.