I was flying about a new world (Seed -8732934775646344018) when I came across a village (-298 599) that had generated part of it's path in a cave, even with the new cobblestone 1 layer underneath the gravel.
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[media][media]
Dupe of MC-45088
The cobblestone still generates, but it generates in the cave.
Changing to duplicate of MC-1948