It isn't a bug after all. Turns out my spidertron was just slightly outside the logistics range of a roboport. And I could've sworn the build requests were included in logistics requests before, but I guess I misremembered.

After researching the captive biter spawner, I can place logistic requests for the spawner or place ghosts, but neither of these show up in roboports set to 'Read logistics network requests'. This makes it impossible to have one built on request.

It works! That's really useful. Now I can make my trains deliver stuff on demand on Fulgora.

The Aquilonian Eagle
They said you can't have holes...
This has advanced asteroid processing and produces it's own ammo for gun & rocket turrets and is capable of ferrying to Aquilo. An ok signal indicates when sufficiently rearmed and refuelled to travel. Plenty of space for expansions. Produces ...

Is there any way to send signals from island to island on Fulgora before unlocking the foundation? I don't have a problem with not being able to transmit power, but it would be nice to be able to create a rail network where stations could request items from a central depot. I often use such a setup ...