Single biome, caves and floating islands world generation have stone as their primary block and water as primary fluid regardless of the biome

Single biome, caves and floating islands world generation has stone as its primary block and water as a primary fluid regardless of the biome.
How to reproduce: create a world with any of these world types and select a nether or an end biome. [X] The primary block is stone and primary liquid is water

Expected results: stone and water generate in overworld biomes, netherrack and lava in nether biomes and endstone in end biomes.