Fauna and flora of Lush Caves spawns above the caves in single worlds

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Please provide the seed and coordinates of where this issue takes place so we can reproduce the issue.

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There's no need of seed, literally just following the repro steps.

This is just how lush cave biomes work, i don't see what's the issue here? they're intended to generate on caves, and the fact it places stuff on the surface creates this "bleeding out" effect.