[MC-237327] Bamboo generated on a cave on top of a gravel in a cave

On seed '7743363111111608875'
Coordinates: -1427 27 -962
There is a gravel with a bamboo on top of it, generating in a cave

Environment

Windows 10, Minecraft Snapshot 21w37a

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We're tracking this issue in MC-145376, so this ticket is being resolved and linked as a duplicate.

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