SpaceAge constant combinator does not send "import from" flag

[Fendis]

Hi,

I would like to control the platform requests via circuit network.
I've set up a logistics group and use it in a constant combinator. That constant combinator is connected to the space platform hub.
The problem is, that the "import from" flag is not sent, only the items and the amount.

What I really want to do ist the following:
I want to have a space platform over nauvis, that is a hub for all items from other Planets.
To do this, I created a logistics group with items I want to import *only* from other space platforms but not from Nauvis.
The problem is: due to that (active) logistics group, it will not allow other space platforms to get items from this platform.
My idea was, to control the request by a timer, so it only requests it for 5 seconds before requesting nothing for another 5 seconds, to give other platform a chance to request items, but due to the fact, that the "import from" flag is not propagated, it will request items from Nauvis, which I don't want..

How can I achieve this?

Any help would be great.

Fendis