I made my forum account just to report this lol, glad to know its not just an issue on my end. Also I'm amazed no one else reported this before, trying to plant trees via robots seems like a thing lots of people would try to do at some point.

I was playing on vanilla Space Age, I do have some mods downloaded, but all of them are disabled.

- What did you do?
Placed a tree ghost in map mode (either by selecting a tree seed from the inventory or pipetting an existing tree)

- What happened?
A tree ghost (that grows, shows health and expected resources) appears that cant be built by construction robots, the bots will just fly from tree ...