Spawn Event Summons Wrong Villagers

I was trying to make test out villager mechanics when I tried to summon a farmer villager using the spawn event "minecraft:spawn_farmer" and it summoned a butcher villager. I did it again, and it summoned an mason villager. I also tried the "minecraft:become_farmer" and the same thing happened, different professions. After a few tries, I finally got a farmer villager though.

What I expected to happen:

When I use the spawn events "minecraft:spawn_farmer" or "minecraft:become_farmer" to summon a farmer villagers. 

What actually happened:

**It summoned villagers with professions other than farmer.

Steps to reproduce:

1. Open chat menu
2. Type "/summon villager ~ ~ ~ minecraft:spawn_farmer" or "/summon villager ~ ~ ~ minecraft:become_farmer" a few times
3. Notice the villager profession