[MC-240495] Deepslate does not generate below Y=0 in Badlands or Wooded Badlands Biomes

The Bug

The deepslate that's supposed to replace stone below Y=0 doesn't work if it's under a Wooded Badlands biome or badlands

Reproduce

Create a world
Do /locatebiome badlands
Go below Y = 0

Observed Result

Stone generated

Expected Result

Deepslate would generate

Linked issues

is duplicated by 1

MC-240581 Biomes are different to the surface biomes, in the caves below y=0, when upgrading from 1.17.1 Resolved

relates to 1

MC-240481 Deepslate doesn't generate in the new cave generation under old chunks Resolved

Attachments

MC-240495.mp4

Comments 5

Welcome 234 2021-11-03T21:14:34Z

Can confirm

SamJoex 2021-11-04T03:10:26Z

I'm getting Stone generating instead of Deepslate in savanna_plateau (which has birch_forest under it).

SamJoex 2021-11-04T03:16:32Z

This anomaly seems to persist in the forest and flower_forest biomes as well.

SamJoex 2021-11-04T03:31:12Z

Hmmmm, this seems to be happening in any biome I visit.

William Horsley 2021-11-04T04:49:18Z

[media]

In most existing areas, it seems that nothing has generated below y=0, and the bedrock remains there. In one pre-existing area of my world (a badlands biome), deepslate did generate in place of bedrock below 0, but no other new generation, as was expected.