Affects Version/s: 1.17.10, 126.96.36.199 Beta, 188.8.131.52 Beta, 184.108.40.206 Beta, 220.127.116.11 Beta, 18.104.22.168 Beta, 22.214.171.124 Beta
Fix Version/s: None
Ores, Dirt, Gravel, Andesite, Diorite, and Granite only generate down to y= -4 and do not generate any lower.
1. Generate a new world with "Caves and Cliffs Features" enabled
2. Run the following command to explore down to y= - 64:
/fill ~-1 -63 ~-1 ~1 ~ ~1 air
3. Observe that no solid blocks generate besides Stone.
Admittedly, this may be a place-holder rather than a bug, because the Deepslate generation features haven't been added yet.