I noticed even with my priority set as high on the Expedition Center and low on the Launch Pad the haulers were still prioritizing the tasks on the Launch Pad over the Expedition Center. I actually don't think I've seen a hauler deliver to the Expedition Center at all, they were even prioritizing picking up resources on the ground over delivery with the priority set. The builder/normal drones work as expected though.
#Hauler Not Prioritizing Expedition Center for Contracts
neon totem
eager wind
I've just noticed my hauler drones filled the EC up to 500 steel then decided to leave the last 500 to the regular drones which effectively fails any contract that needs you to transport anything from the EC within a time limit. I won't be taking any contracts that are moon based, travel time is exceptionally high, contract time is often low and with this bug that I've seen happen multiple times its untenable.
I've tried save/load
de-assign all Haulers then reassign but they just go back to collecting regolith in the underground instead
OK, I got mine to haul to the EC again, I have to turn OFF anything that allows Regolith to be deposited - looks like the Hauling bot has a broken priority. Any regolith on the ground with an available storage location takes priority over (at least) the ExpoCen
toxic ermine
Can confirm. Hauler bots have a severe allergy against the Expedition Center.
Also, since you cannot demolish and rebuild it somewhere else, if you build it somewhere awkward, you're effectively screwed for the rest of the game when it comes to transport times.