Copy containers (FlowNodes, ForEach, ...), container activities not copied...

Good morning,
At the moment, within 3.0.0-preview.727, during copy of a container the activities are not copied.
They have the same IDs as the activities from the source container.
Now, if I change the activities within the source container, the activities in the destination container are changed, too (and vice versa). This can easily lead to an unexpected behaviour of the workflow.

I am not sure if the current behaviour is by design or not. For me a copy, should copy the whole thing.

Repro Steps:
- Create a FlowNode and add a activity
- Copy the FlowNode
- Change the destination activity
- Source activity is changed, too

Thank you! Good Work!
regards
Jochen Steinbrenner