Affects Version/s: 20w12a, 20w15a
Fix Version/s: 20w16a
Category:Crash, World generation
This preset gets stuck on 0%, with the diagram on the loading screen looking like in the image below.
A world with the alternate preset
generates in a reasonable amount of time, but lacks trees.
Possibly related to
EDIT: Crimson Forest and Soul Sand Valley superflats not tested.