When a fallen tree replaces the bottom half of tall vegetation, the top part of the vegetation still generates

When a fallen tree generates into a large fern or similar vegetation, the top part of the vegetation is not removed.

To reproduce

1. Create a world with seed -6645951518845799228

2. /execute in minecraft:overworld run tp @s -710.39 66.00 744.06 -44.73 9.23

   Observe the half-fern on top of the log