The issue is that when I add an existing element from one diagram to a second diagram and make some additions to the second diagram then the element will be automatically relocated from the original package into the package where the second diagram lies.
I'm not sure that's a right behavior, but I would like to keep the element in the original package.
Here is the steps to reconstruct the case:
1. Create a package named StateModel in the project and a StateMachine diagram with some elements (State1, State2)
2. Create a package named ProcessModel in the same project and a BPMN2.0 Business Process diagram with some activities
3. Find and drag and drop the State1 element from the project browser into the ProcessModel diagram and make a Dependency connector from an activity to the State1 element.
4. Save the process diagram
5. Verify that the State1 element is still under the StateModel package
6. Modify the ProcessModel diagram by adding a new activity to the diagram and save it.
7. The State1 element will be automatically relocated into the package ProcessModel as a consequence.
I'm working with a EA 11.1.1111 version
I much appreciate any help or suggestion

Cheers