Many Custom Biome Issues

MCreator Snapshot 2020.3 Issue

Here are my issues:

- I have made a custom biome and set the mobs I wanted to spawn in it; however, I did some testing and the only mob that I could actually get to spawn was a magma cube. I tried selecting the broader entity types instead of specific ones, and even that did not fix the issue.

- MASSIVE lakes are spawning even when the box is unchecked.

- No sand patches when set to spawn

- No gravel patches when set to spawn

- No dead bushes when set to spawn

Here are my biome configurations for reference if I possibly made a mistake:

Ground Block: has a material of grass

Generate Lakes: unchecked

Vanilla Trees (set to 0 per chunk)

Grass per chunk: 0

Vanilla flowers per chunk: 0

Mushrooms per chunk: 0

Big mushrooms per chunk: 0

Gravel/Sand Patches per chunk: 5 each

Reeds/Cacti per chunk: 0 each

Dead bushed per chunk: 7

Raining Possibility: 0.2

Biome Temperature: 2

Biome Height: 0.05 Base, 2 Max

Bime generates in overworld: checked

Biome weight: 72

Biome type: DESERT

Biome category: DESERT

Biome Dictionary types: Hot, Sandy, Mesa, Wasteland, Spooky

Entities to spawn: Enderman, Skeleton Horse, Bat, Ambient Creature, Husk, Creature