Villager babies have no profession

The bug

When you spawn in a villager with an egg, it has a profession, but if you breed / use a spawn egg the villager will make a villager that has the old farmer skin, but when it grows up it has no profession, and no trade. And this 'non-villager' seems to be dominate ( always a non-villager ) when having a kid.

Code analysis

Code analysis by liach can be found in this comment.

Zombie villager fixed in 19w03b.