Can't load back colonists

[vorpal+5 (OP)]

I'm hesitant to call it a bug, but it sounds like one, at least. I drop 200,000 colonists on a new colony, but then realize there is a tiny bit of insufficient infrastructure for them (by a factor of 10), so I order to load back 180,000 and... nothing happens, even after 10 days. I move back and forth to another moon, save and restart the game, redo the order, but still nothing happens. My colony ships definitely have transport shuttles.

Any explanation other than a bug?

[Noriad]

I'm not an expert on this game but in the economics screen, tab "civilian/flags" you can set a colony as "source of colonists", "destination of colonists" or "stable".
However, if the population is less than 10 million, you can only select "destination of colonists".

[Garfunkel]

That's for civilian shipping lines and does not affect player-controlled colony ships.

The colony needs either a spaceport or a cargo shuttle station, or each colony ship needs its own cargo shuttles. Sounds like covered all iterations (save&load, construction cycle) so this does sound like something being wonky.

[vorpal+5 (OP)]

Ok, I'll post the save in the debug thread. These ships are standard colony ships, they drop & load, except in this specific case, they don't want to load back.