Chicken, cow, and pig variants spawn as temperate in desert

Chicken, cow, and pig variants spawn as temperate mobs in deserts.
Steps to reproduce:
Open a world in 25w06a
Travel to a desert biome
Spawn a chicken, pig, and a cow
Observed result:
The mobs are spawned as their default or temperate mobs
Expected result:
The mobs should spawn as their warm variants due to the desert being a warm biome.