Baby zombie horses, skeleton horses and camel husks grow into adults, unlike other baby undead mobs

Baby zombie horses, baby skeleton horses and baby camel husks grow into adults, this is not the case with other undead mobs, and the baby zombie horses does not grow in Bedrock Edition.

Steps to reproduce the issue:

• Spawn them and wait until they grow.

Expected result:

• They should not grow.

Actual result:

• They grow.