Summary:

Mobs can spawn in the wrong biome. So far, I've only seen this problem with wolves, but maybe this applies to some other mobs as well.

For example, wolves can only spawn in the taiga, but in the seed below they are generated in the jungle. This is also a problem for the java version MC-236897.

Seed: 63654350
Coords: -5643 83 -226

Steps to reproduce:

1. Create a world with the specified seed.
2. Teleport to the specified coordinates.
3. Look at the small clearing nearby and change the height (higher and lower so that mobs spawn and despawn).

Observed results:

In the biome (jungle) where wolves should not spawn, wolves spawn.

Expected results:

Biome specific mobs such as parrots and wolves to be limited to their appropriate biomes; jungles and forests/taigas, respectfully.

Image: