The shield position is wrong.
Steps to reproduce:
Import any custom skin.
Set the model to "slim".
Equip a shield.
Observe how your shield is held in 3rd person view.
Observed results:
The shield is held incorrectly. It should be centered, but isn't.
Expected results:
The shield should be centered.
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The skin doesn't appear to be from the character creator.
@unknown, is this a skin from the character creator or not?
Can confirm, affects 1.21.51. I was able to reproduce this with any other custom skin that had been imported and used the "slim" model. Relates to MCPE-152607
Steps to reproduce:
Import any custom skin.
Set the model to "slim".
Equip a shield.
Observe how your shield is held in 3rd person view.
Observed results:
The shield is held incorrectly. It should be centered, but isn't.
Expected results:
The shield should be centered.