Had a long day yesterday, I'll brace myself and post the thing tonight, after work. Incoming!
I cannot reproduce the thing and I can neither find the save where that happened, in the pile of my aborted games. Either I failed to see something at the time, such as a legion or transport building (which would be the most probable possibility), or even a locked unit in a stack, or I found a complex bug case (which I fail to believe myself).
As Franciscus pointed out, it should not be possible and the visual position of the ship in the region does not seem to matter as much as I believe.
So, if I see anything suspicious of this kind, I will post my save in this thread. Until then, sorry for freaking you out, nice Ageod people
