The underlying cause of this issue has been fixed in the newest version of the game! Please make sure you are running version 6.3.0 to make sure this doesn't happen to your game.
If your planet has reset and you are missing Gilding, here's what we need from you:
- PlayFab ID Tap on (Menu > '?' > check bottom left corner)
- Screenshot of your affected planet Statistics (Menu > Career > Statistics)
- Screenshot of your affected planet investments
We can be reached at firstname.lastname@example.org.