Dispensing a shield on a mob places it incorrectly

Summary

Dispensing a shield onto a zombie, husk, pillager, vindicator or evoker will cause it to be placed wrong on the model (in their neck)

Steps to reproduce

1. Fence a Zombie into a 1x1 with a dispenser on one side
2. Place a shield into the dispenser and activate
3. Note the placement of the shield

What I expected to happen...

The mob should hold the shield

What actually happened...

The shield went through the zombies neck

Original description:

If you use a dispenser to give a zombie, husk, pillager, vindicator or evoker a shield, it will be attached on its neck and not on its arm.