Nether ground vegetation can generate floating over bastion remnants

Steps to reproduce:

1. Generate a standard world with the seed “5577945526848624290”.

2. Enter creative flight.

3. Execute

   /execute in minecraft:the_nether run tp @s 70.94 54.76 -403.98 -289.50 36.15

Observed results:

Nether vegetation generates floating in the air over the bastion remnant.

Expected results:

Nether vegetation should not generate floating.