Player body/first-person model renders semi-transparent with no mods or resource packs

Short description:

Since first installing the game, the player's body/arms render as semi-transparent in First Person view, with no Resource Packs or Add-ons applied to the world.

Steps to reproduce:

1. Create a new world with no packs enabled.

2. Switch to First Person view.

3. Look down at your body/hands, especially near water or in low light.

4. Observe visible transparency in the player model.

Expected result:

The player body should render fully opaque.

Actual result:

The player body is consistently semi-transparent, revealing the environment behind it.