Foxes that spawn in grove biomes aren't the snowy variant

The Bug

Foxes that naturally spawn in grove biomes aren't the snowy variant of the fox

Reproduce

• Open a single biome grove type world
• Do /tp @e[type=fox] ~ ~ ~

Expected Result

The foxes would be the snowy variant due to it being a cold biome

Observed Result

The foxes were the normal variant