Yes, sorry, my message was not very complete, it is the "RemoveWhenComplete" that does not work (in my memories).which my mod hasn't.
However, this gets enabled by your Reforestation mod so for those players who use also that mod (or any other mod with the code above) the Atoll thing works as intended.
It's a bit freaky, not gonna lie.
What seems to not work is "RemoveWhenComplete=1" because the dummy atoll improvement stays when it should disappear although that is a smaller concern because workers can replace it to build the GPTI.