I just noticed something - not sure whether it's a bug or a feature.
Dyson 1.10
I right-clicked my home asteroid to send a bird to a nearby, unexplored asteroid, to see what was there.
A moment later, and before the bird actually departed, I clicked the button to build a new tree on my home asteroid, which vaporizes 15 of my birds.
I guess one of the vaporized birds was the one that was going to fly to the nearby asteroid, because that never happened and I had to send a new one.
Again, I can't say that this is a bug, exactly, because this may be the way things are supposed to work.
Just an observation.