I'm getting a similar behaviour in my SpaceEx game without Attach Notes installed. Trying to make a fuel station that can supply to other fuel stations:
https://i.imgur.com/fn9kFEm.png
I have two of these corner stops with 5 drones each, buffer station into a fuel station. The drones go to the further away fluid depot instead of the closer buffer that has >5k petrolium. Factorio 1.1.18, drones 1.0.4, mod list includes SpaceEx and the AAI mods that it recommends/requires (Industry/Containers/Signals, no vehicles). I know there's some other issues with drones actually in space, this is still on Nauvis so not the same as those issues.