[Experimental] Nether Trees Are Bugged

Summary: Nether Trees are Bugged as Shroom-lights are now exposed which isn't supposed happen.

Steps To Reproduce:
Step 1: Go To Nether in 1.17.30.23 with Caves n Cliffs Enabled.
Step 2: Find a Warped or Crimson Biome.
Step 3: Find Trees.
Step 4: Repeat.

Observed Result: Shroomlights and Hyphae Dont Generate Correctly and Trees Eclipse into Netherrack at y120.

Expected Result: Nether Trees Shouldnt Be Bugged