Sorry to hear you are facing that issue. We'd hadn't had reports of issues with FP7 until now, but it could be related to the RailClone issue mentioned above. Would you mind sending us a test scene that reproduces the issue to firstname.lastname@example.org. Thanks!
Another workaround is to use Forest Tools to instantiate the scatter to native Max instances. This will be more efficient than collapsing it to an editable mesh.