Dark Rogue Starter at makeshaft watchtower (Zirax), after destroying its core, I went to mine copper and silicon, but there are nothing at all. I went 4 ways tunnel in case I couldn't see blue highlighted rock shape underground from distance, but I found nothing. I have ore scanner in inventory. Restarting and deleting cache didn't fix that at all. Still empty.

EDIT: Never mind. Found your info about nuggets have small chance to cause empty bug, so I guess I should have gone with voxel instead. Empty nuggets are pain in the butt because meteors may not come if too many empty. That's the problem especially on dark rogue planet. I created new saved data with god mode and went to same spot that I had problem in old saved data, and nuggets appeared, so it is randomly empty nugget chance.