So if you send the planet cracker to harvest all the resources at a planet not only does it not leave the planet but it bugs out the planet.

I sent it to andromeda, harvested all oil. It still said extracting even though it was 8k/8k and there was no animation left it was harvesting anything. I had to send it back to my home planet manually. After I did this the planet went invisible on the star map but it still shows in my list of planets as if it is colonized. It's not auto harvesting all the resources and returning automatically then destroying the planet afterwards.