Changing the player's arm position breaks the Character Creator

I discovered an issue of the Character Creator no longer working and my personas showing up as Steve if I use a Resource Pack that changes the player's arm position to show more pixels of the hand,

but modifying the animation.player.first_person.empty_hand values in the player.first_person.animation.json file will break the Character Creator as soon as the changes to the file are made.

Steps to Reproduce:

  Go to Resource Packs
  Select the Resource Pack that adjusts the player's arm height
  Enter the Dressing Room

Observed Results:

The Character Creator stops working, but the items still show up, but the custom characters shows up as Steve.

Expected Results:

The Character Creator should've worked perfectly fine with the Resource Pack enabled.

Screenshots:

Notes:

The issue started occurring when the character creator was introduced in the eighth beta version of 1.13.0, 1.13.0.15

I have included a screenshot of the Bug and The Resource Pack I used.