Steps to reproduce:
1) deploy a process with two user tasks
2) start an instance of that process
3) go to cockpit
4) select the started process instance
5) assign the pending user task to "demo"
6) modify the process instance (move to token to second user task)
7) open user operation tab in historic process definition view

Observed Behavior:

• The user operation log contains two rows, see cockpit-user-operation-log-1.PNG:
  1. Operation Assign
  2. Operation ModifyProcessInstance
• But sometimes it also shows, see cockpit-user-operation-log-2.PNG:
  1. Operation Assign
  2. Operation Delete

Expected Behavior:

• The user operation log shows always the same.

Hint:

• The implementation [1] does not respect that multiple user operation can have the same operation id but different operation types.

[1]: https://github.com/camunda/camunda-bpm-platform-ee/blob/f1683c519fbf7ebecddb16d0512713790761b0af/webapps/camunda-webapp/plugins/src/main/resources-plugin/cockpit/history/app/components/userOperationsTable.js#L49-L65