Description of problem:
Designer generates new elements in process, when an user click on any element.

New generated elements are hidden behind current one.
After clicking on element there is no visible effect which sign that the click was successful.

So the user can repeat this action how many times he wants. Each click generates new elements.

At the end, the process with 3 visible nodes may contains decades of elements.

Version-Release number of selected component (if applicable):
6.0.1 ER1 BPMS

How reproducible:
use IE10, IE11 has not tested yet

Steps to Reproduce:
1. Create valid process in different browser (for example Fire Fox)
Start->Task->End
2. Save process
3. Open process in IE
4. Activate Start node
5. Validate process (click "View all issues")
6. Save
7. Open process in FF again
8. Move task element
9. Move end element

Actual results:

Process is not valid now, even if process was valid in Fire Fox.

Validation result (step 5):

• Node has no incoming connections

Problems tab (step 6):

• Process 'test' [project1.test]: Task node '' [1] has no incoming connection.
• Process 'test' [project1.test]: Node '' [2] has no connection to the start node.
• Process 'test' [project1.test]: Node '' [1] has no connection to the start node.

Step 9: see screenshot

Visual validation does not shows any problems, because new elements are placed on same position as the valid one.

Expected results:
Click on element shows just quick Shape Menu. No others side effects.

Additional info: