Rabbits not spawning in Forests

Rabbits are not spawning in Forests at all. Instead they spawn in Deserts.

What I expected to happen was:
Rabbits would spawn in Forests.

What actually happened was:
Bunnies do not spawn in Forests at all, and spawn in Deserts.

Steps to Reproduce:
1. Enter a seed that spawns you near a Forest. No rabbits are seen at all.
2. Enter a seed that spawns you near a Desert. Rabbits spawn there instead.