I found that the construction mode for the robo-ports seem to not be connected to the other roboports (maybe set on different logistical network. not sure) If I have a starter base with an logistical network and want to extend the construction portion of that network (in my case I only want the bots to construct my train network and but not do logistics) Even if the construction areas overlap using the construction mode of robo-ports, the bots in the starter base will never take actions and I get warnings saying materials are missing.
I turned everything off except krastorio 2 and in god mode set up 2 roboports with connected logistics and then a third one same distance away but in construction mode. The bots will not build in the "extended" construction area even if bots and material is available in the logistics zone.
tested in 0.9.6 and 0.9.8 other wise so far I am finding this mode to be a gereat work of art! Thanks for the hard work!