Cocoa beans can generate on invalid blocks

The Bug:

Cocoa beans can generate on invalid blocks.

Here is an example:

Seed: 2253284252830357953
Coordinates: /execute in minecraft:overworld run tp @s 345.49 69.40 36.89 26.55 30.60

Steps to Reproduce:

1. Generate a world with the seed provided above and teleport to the given coordinates.
2. Look closely at the cocoa beans and the block that they're supported by.

Observed Behavior:

Cocoa beans can generate on invalid blocks.

Expected Behavior:

Cocoa beans would not be able to generate on invalid blocks.