Spider effect in OAB diagram

In a OAB diagram, When I allocate into an entity an operational activity which host several activities linked together, there is a spider effect : All interaction between hosted activities appear in the diagram through a Arrow which start and end on the allocated activities.
How can I remove this effect ?

Do you mean this?
This is absolutely not normal, it is a bug and I have transmitted it to the delveopment team who will consider it with a high priority.
I’ve tried a few workarounds, but none gives an acceptable result as along as you want to display interactions of this composite activity with other activity.
The only way I can see is to manually hide these exchanges.

Yes, it is exactly my issue.
and Yes, i hide the interactions manually.

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