Baby horses, donkeys and mules spawned by using spawn eggs on tamed adults come in a broken state

Steps to Reproduce:

1. Find or spawn a horse, donkey or mule

2. Tame it

3. Use the corresponding spawn egg on it to spawn a baby

4. Feed it wheat until it grows up

5. Try to ride it

Observed Results:
The grown up baby is completely untameable, but does not ever kick you off its back.

Expected Results:
The grown up baby is instantly tamed, as it was spawned through a tamed horse.

Notes: