The initial network ID fails.

1. Configure LTN to use network ID 1 as a default.
2. Place an LTN Combinator. Click on it and notice that it will have network ID 1 (correct).
3. Draw a wire to a pole, notice how it will have no signals enabled. It is as if it is disabled when created, even though I don't use that option.
4. Place a constant combinator and configure it to generate the LTN Network ID 2. Draw a wire to the LTN Combinator.
5. The pole will now show the LTN network ID 2, not the expected network ID 3.

See picture for example of a configuration: https://photos.app.goo.gl/Kr88RL2vgk5HvtpM8
And the resulting output, notice missing ID signal: https://photos.app.goo.gl/osu89WD7iaXBfSDk8

What I am trying to achieve: I use network ID 1 by default. When I detect an overflow in a provider station, I want to add network ID 2 dynamically. That makes the surplus items available on an alternative network.

This should be addressed in the new version. I've added a setting to keep default signals if explicitly set. This defaults to off.