Flint (and possibly other small stones) spawn in water

[septemberWaves]

I just started up a new world, and looking around for stones I noticed some pieces of flint that had spawned within a small pond, displacing the water with harsh block borders. They also spawned on soil at the bottom of this pond where gravel appears to otherwise be. This doesn't seem to be gamebreaking at all, but it does make a bit of a mess of the visuals. Also, if it helps, the stone in the area where I encountered this issue is chalk (I have not yet played the game long enough to know if it happens elsewhere).

[Tyron]

Oh yes, that world gen bug is my arch nemesis. Tried to fix that one multiple times, but with no success just yet.