My Workflow Tasks associated with an asset share the same Last Activity Date

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.0.X, 7.1.X, 7.2.X
• Fix Version/s: 7.1.10 DXP FP20, 7.1.10.5 SP5, 7.1.X, 7.2.10 DXP FP9, 7.2.X
• Component/s: Workflow > My Workflow Tasks
• Labels:
  • ee-ts
  • liferay-dxp-71-sp5
  • liferay-fixpack-dxp-20-7110
  • liferay-fixpack-dxp-9-7210
• Branch Version/s:
  7.2.x, 7.1.x
• Backported to Branch:
  Committed
• Fix Priority: 3
• Git Pull Request: https://github.com/liferay/liferay-portal-ee/pull/21020

Summary:
The tasks in My Workflow Tasks display the wrong Last Activity Date. Specifically, tasks associated with an asset have the same Last Activity Date.

Upon investigating, this issue was indirectly resolved in master by LPS-105210.

Reproduction Steps:

1. Go to Control Panel -> Workflow -> Process Builder -> Configuration and enable Single Approver Workflow for Message Board Message.
2. Go to Liferay -> Content & Data -> Message Boards and create two threads called "Thread A" and "Thread B".
3. Navigate to My Workflow Tasks and under Assigned to My Roles, assign "Thread A" and "Thread B" to yourself.
4. In Assigned to Me, reject "Thread A" first then "Thread B".
5. Resubmit "Thread B" first then "Thread A".

Actual result:
Tasks associated with Thread A have the same Last Activity Date. Same thing with Thread B.

Expected result:
Each task should have a different Last Activity Date.

Reproduced on:

• 7.2.x: 1eb787031c328560
• 7.1.x: 7cdd9a16a363d96e
• 7.0.x: af0176a5261fd836