It could be a distance or pathing thing. If they've got Open Airlock permissions turned off that could also do it.
#Haul tasks immediately drop item and then get removed
ashen lichen
main bobcat
I've had this problem in version 0.13, thought it was the pathing being janky but they would haul things that were further away than the thing they picked up and dropped. Would happen every time I put a haul order on that item and I would end up just doing it manually
uneven warren
Yes, this is 100% reproducible if you dock at kleg, and the try to order your toon directly to besides your starting bedroom sleeping bag. It always fails for me untill I click outside , on the hallway
wind cedar
Just for anyone looking in the future, i had this issue and deleted a zone that was between multiple airlocks and that seemed to fix it
lunar fog
Yes, this is 100% reproducible if you dock at kleg, and the try to order your to...
conjecture, but maybe it's fog of war?
barren flax
A small fix for pathing issues is to give them a straight line to the goal. Every door, airlock and turn (pretty sure its mainly turns) make it more unlikely that pathing finds a way to the target. Had my dude have no problem hauling stuff from the very tip of a titanmax to my storage (100+ tiles) but they couldnt path 50 tiles through a door and around a corner (Also from Airlock to starting room). Edit: FOW is a maybe, didnt do any tests. Had it turned off on KLEG and still couldnt path to room from airlock. Had it turned on on the Titanmax and my dude still found the way.
sand yoke
Yep, I think it may be something related to this.
I've had a lot of times where my character instantly drops the item I've tasked them to haul, so I try to manually get them to pick up the object and direct them to the drop point, however I can't send my character directly there and have move them a bit closer before I can click on the tile I want them to drop at.
...Not 100% sure, though.
winter dust
Having this issue now where the parts on the derelict I'm trying to haul just get dropped instantly, probably 4-5 doors to go through to get to the storage