Baby zombies mever grow up

Baby zombies use the IsBaby tag instead of the Age tag like other ageable mobs. Resolving as Works As Intended as per the resolution of MC-172618.

MC-172618 is not a valid source. Zombies are a completely different mob than the piglin. 

While a different kind of mob, zombies were the first to introduce a baby boolean, rather than timer. There's no doubt about developer intentions here.

Dhranios are you a dev? Can you read the devs thoughts? No, you can't so you cannot say its intentional. 

A new NBT method to save it is a baby that's a true/false, and not a timer, while the rest of the baby mobs used a timer since day one, is not an accident and only happens deliberately.