What Role/Privilege is required to Delete a Role Delegation created on behalf of the Delegator?

Summary:

We can create Role Delegations on behalf of users via Person Management > Personal and Employment > User Account and Add under Role Delegations.

The issue that we are encountering is that apart from the Delegator and Proxy only the Creator of the Role Delegation can Edit/Delete it, which becomes problematic when the Creator has left the organization.

Even with roles IT Security Manager and Human Resources Specialist assigned we cannot delete the created Role Delegation, the pencil icon to update is not displayed.

We've also tried to access the Task 'Manage Delegations' in Setup & Maintenance but the task is greyed-out