[MC-242381] Visible chunk border in windswept hills

When updating a 1.17.1 world to 1.18 the biome/world blending seems to not properly blend the stone and grass causing a visible chunk border.

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This world was generated in 1.17.1. If you load the world in 1.18pre5 and teleport to these coordinates you will see the issue:

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Linked issues

Can't see it in my world

Did you test the world I uploaded? It's still happening in that world with prerelease 7.

You can use this command to see the issue /tp @p 116 91 -324 -10 70

1.17.1

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1.18 prerelease 7

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