Baby animals, villagers, and zombie villagers spawned with a spawn egg on an adult entity always are of the same variant

The bug

When spawning a baby animal, villager or zombie villager by right-clicking onto an adult entity with a spawn egg, the baby entity will always be of the same variant.

For instance the baby villager's skin will always be the plains biome skin, no matter in what biome this takes place or what biome skin the adult villager has.

This is known to affect the following mobs:

• Villagers

• Zombie villagers

• Cats

• Horses

• Llamas

• Trader llamas

This list may be incomplete.