[MC-159850] "Bee Hive" doesn't generate on trees when importing old world

When creating a world in 1.14.4, then importing it into 19w34a and growing trees, no bee hives are spawning/generating.

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Dear Mod violine1101, this is a bug.

Sinceirly,

A MineCraft player who has played the game.

How so? Features from new versions are never added to already existing chunks.