What is the expected behavior of a human task configured within a Lane?

Issue

The documentation says the following:

"In Process Designer, if a Element with the Actors or GroupID property defined, any new Elements defined in the Lane adopt the property values automatically."

However, it seems that the design and runtime behaviour does not correspond to the above definition:

• [Q1] When two Human Tasks are present in the Lane, and only first one has set Actor/Group attribute the subsequent Human Task does not have it set automatically. Is this expected?

• [Q2] When using the same process definition - when second human task has actor/group field empty, the process simply does not continue after first human task is completed. Is this expected?

• [Q3] How to use Lanes to assign Actors(GroupID) at design time (or/and runtime) ?