Pending and Completed task sections change their positions when are sorted by Ascending/Descending in My Workflow Tasks

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.0.X, Master
• Fix Version/s: 7.0.0 DXP FP47, 7.0.0 DXP SP8, 7.0.X, 7.1.X, Master
• Component/s: Workflow, Workflow > My Workflow Tasks
• Labels:
  • ee-ts
  • liferay-digital-enterprise-70-sp8
  • liferay-fixpack-de-47-7010
• Branch Version/s:
  7.0.x
• Backported to Branch:
  Committed
• Story Points: 1
• Fix Priority: 3
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/57105

Regarding LPP-29694, there is a bug when user attempts to sorting by Ascending/Descending and there are 'Pending' and 'Completed' tasks in his 'My Workflow Tasks'. 

Steps to reproduce master/7.0.x:

1. Start a portal and login with an user with administrator role.
2. Go to Site Menu > Dynamic Data Lists.
   • Create new DDL with any Data Definition (e.g. 'Contacts') and Workflow 'Single Approver'.
3. Add 21 new register created in step 2. (we need 21 because page size by default is 20).
4. Go to User Menu > My Account > My Workflow Tasks > tab Assigned to My Roles and click on 'Assign to Me' by Kebab Menu (all 21 tasks).
5. Go to User Menu > My Account > My Workflow Tasks > tab Assigned to Me and 'Approve' most tasks except one, the more recent.
6. Sorting by Ascending/Descending buttons.

Expected behavior:
Pending task should be always in first position, before Completed tasks.
Current behavior:
Pending tasks goes to last position, after Completed tasks. sorting_completed_pending_task.mp4