Workflow Metrics: Filtering All Items data by Unassigned is returning no results

• Type: Regression Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: Master
• Fix Version/s: 7.3.10 DXP GA1, Master
• Component/s: Workflow > Metrics
• Labels: None
• Fix Priority: 4
• Git Pull Request: https://github.com/inacionery/liferay-portal/pull/626

Current issue: Filtering All Items data by Unassigned is returning no results

Steps to reproduce:

1. Associate Single Approver with Blogs Entry
2. Create a blog entry
3. Go to CP > Workflow > Metrics > Single Approver > Click on the pending items number
4. Filter the data by Unassigned

Actual Result: No results found message is returned.

Expected Result: The blog entry instance should be displayed.

Environment:
master DXP: 51b0c2844b2c29a02abfcdeb0fa2f02d3300f72f