Armor worn by villagers doesn't render

The Bug:

Armor worn by villagers doesn't render.

Steps to Reproduce:

1. Summon a villager that's wearing a diamond chestplate by using the command provided below.

   /summon minecraft:villager ~ ~ ~ {ArmorItems:[{},{},{id:"minecraft:diamond_chestplate",Count:1b},{}]}

2. Check to see whether or not the villager is wearing the diamond chestplate by using the command provided below.

   /data get entity @e[type=minecraft:villager,limit=1,sort=nearest] ArmorItems

3. Take note as to whether or not armor worn by villagers is rendered.

Observed Behavior:

Armor worn by villagers doesn't render.

Expected Behavior:

Armor worn by villagers would render.