I expected that to happen, though it is something I would change if I could. Any time the requirements for a building are no longer met, the building is automatically scrapped. You say the same with Solar Kiln for example if you transform to a biome that can't support it. I can't change the mechanic, but fortunately it's a pretty rare occurrence with mineral changes only happening with random events.

引用自 Spud Dastardly：

I expected that to happen, though it is something I would change if I could. Any time the requirements for a building are no longer met, the building is automatically scrapped. You say the same with Solar Kiln for example if you transform to a biome that can't support it. I can't change the mechanic, but fortunately it's a pretty rare occurrence with mineral changes only happening with random events.

I understand you should lose it if the planet changes to something that can't support the building, but in this case the planet could still support the building after it changed (I rebuilt it straight after).

Like you say though, not a big deal; it's not as bad as being hit with a major quake in the early game ;)

By the way, when you lose a building, do you get any coin for it?

The game considers it a different building. There's actually a few dozen versions of the toxic condenser and advanced toxic condenser: one for each size/mineral combination. The one you rebuilt probably had less cleanup because the mineral richness was lower.

引用自 Explore：

By the way, when you lose a building, do you get any coin for it?

I noticed my money jumping up a few times when i had negative income. I watched that and came to the conclusion it happened when terraforming was done and the buildings were scrapped.
So I say yes, you get money.