BPMN Activity moves in Project Browser.

[Gary_Barnes]

I am using the BPMN addin. A BPMN activity that I have created keeps moving it's location in the project browser.

I create a diagram (A). I put a pool (poolA) on diagram A and put a lane (laneA) in poolA. I then put a BPMN activity (X) in laneA.
In the project browser I now have:
<<Pool>> poolA
 <<Lane>> laneA
   <<Activity>> X

I then create another diagram (B). I put a pool (poolB) on diagram B and put a lane (laneB) in poolA. I drag the existing BPMN activity (X) into laneB.
In the project browser I now have:
<<Pool>> poolA
 <<Lane>> laneA
<<Pool>> poolB
 <<Lane>> laneB
   <<Activity>> X

If I then go back to diagram A and move activity X slightly the project browser changes to:
<<Pool>> poolA
 <<Lane>> laneA
   <<Activity>> X
<<Pool>> poolB
 <<Lane>> laneB

The parentage of the activity flip flops from one lane to the other depending on which diagram it was last moved on.

I believe that the activities should not be parented to the lane that they are displayed in but to their parent activity (if they have one).