If you use a datapack that changes cave biome layout it will force the surface biome instead
in some places as if the cave biomes don’t exist in them areas
will upload a picture comparing the two
make public after reading this
may be due to some intended limit to very the existing caves on the y axis
realy should be checked biomes only work right in lay out when no surface biomes exist in multinoise
the all caves datapack has full temperature noise range lush.png shows an area were it does it wrong
Resolved as a duplicate of MC-236786.
Please don't create duplicates of your own bug reports.