There should not be a diffs option on the first completed workflow task

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.1.X, Master
• Fix Version/s: 7.1.10 DXP FP10, 7.1.10.2 SP2, 7.1.3 CE GA4, 7.1.X, Master
• Component/s: Workflow > My Workflow Tasks
• Labels:
  • ee-ts
  • liferay-dxp-71-sp2
  • liferay-fixpack-dxp-10-7110
• Branch Version/s:
  7.1.x
• Backported to Branch:
  Committed
• Fix Priority: 2
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/69780

Issue
If we create a web content article and make 3 edits the diff information is out of sync.

Steps to Reproduce
1. Go into Product Menu > Control Panel > Workflow > Process Builder > Configuration
2. Next to "Web Content Article", click Edit, and set Single Approver Workflow
3. Add an Asset Publisher to the default Welcome page
4. Configure Asset Publisher > Configuration > Display Settings > Show and Set > Check off Set as the Default Asset Publisher for this Page
5. Go to Product Menu > Liferay DXP > Content > Web Content > Basic Web Content
6. Title "Test", then under DISPLAY PAGE > Select "Use a Specific Display Page for this Web Content" > Choose > Public Pages > Welcome, then click Done, then Submit for Publication
7. Under My Workflow Tasks > Assign to My Roles, assign to me
8 Under My Workflow Tasks > Assign to Me, approve the change 
9. Edit the content item name to "Test CHANGED", and submit for publication  
10. Under My Workflow Tasks > Assign to My Roles, assign to self 
11. Under My Workflow Tasks > Assign to Me, approve the change 
12. Edit the content item name to "Test CHANGED AGAIN", and submit for publication  
13. Under My Workflow Tasks > Assign to Me > Completed, click the first task to open it  
14. Under My Workflow Tasks > Assign to My Roles, assign to me
15. Under My Workflow Tasks > Assign to Me, approve the change 
16. Under My Workflow Tasks > Assigned to Me > Completed, click the "Test" task

Actual Result
Viewing the diff on Test (article 1) we see information for Test CHANGED (article 2) is present.
Viewing the diff on Test CHANGED (article 2) we see no information.
Viewing the diff on Test CHANGED AGAIN (article 3) we see information for Test CHANGED (article 2).

Expected Result
Viewing Test (article 1) there should be no diff option
Viewing Test CHANGED there should be diff info from Test (article 1)
Viewing Test CHANGED AGAIN (article 3) there should be diff info from Test CHANGED (article 2)