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MC-223846

Data packs are sometimes not checked when a custom world is loaded for the second time

Basically affects every version after custom biomes in data packs were added. Loading a world with a custom world generation data pack works fine, but in some cases closing and re-opening the world results in strange biomes ("minecraft:ocean", "minecraft:empty", or "null") replacing all biomes and extreme lag when crossing chunk borders.

Linked issues

Comments

migrated

Duplicate of [MC-197616]

[Mod] ManosSef

(Unassigned)

Unconfirmed

(Unassigned)

1.16.5, 21w16a

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