Lush cave features (especially vines) can generate in places like amethyst geodes where they are not supposed to be.
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I believe this ticket is a duplicate of MC-218628, since other lush cave features such as grass, azaleas, etc... aren't actually generating within the geode but instead generate beside it.

Dupe of MC-218628
Does Vine mean glowberry? If so, it could be a duplicate of MC-218628.
Resolved as works as intended