How to make the HR tasks unassigned when an HR LifeCycle is created.
New York Patch 1 Hot Fix 1a
The instance has configured Assignment Groups in his HR task templates which are used in Activities. When Assignment group is populated and assigned_to is empty the HR Matching Rules will assign the tasks. If this functionality is not required then inactivate the Matching rules of HR tasks, This can be found under HR Administration -> Assignment Rules -> HR Matching Rules.
There are 2 matching rules on HR Task, Agents by skills and country and HR Task, Agents by skills, if these two are disabled then the tasks won't be auto-assigned.