I got a crash with this exception. I was exploring a snow biome with creative flight.

---- Minecraft Crash Report ----

Time: 12/31/21, 2:52 AM
Description: Getting biome

net.minecraft.world.level.chunk.MissingPaletteEntryException: Missing Palette entry for index 3.

Full crash log here...

crash-2021-12-31_02.52.55-client.txt

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