Attacking hitbox through wall with an axe disables held shield

[Description]
During a PvP tier test on a multiplayer server, a severe hitbox clipping issue occurred. When a player stands completely flush against a 1-block thick solid wall (such as obsidian or stone) while holding up a shield, their hitbox slightly clips through the block.

If another player on the opposite side attacks the wall using a close-range weapon like an axe or mace, the game registers it as a valid hit on the clipped hitbox. This results in the shield being disabled/stunned and the player taking damage right through a completely solid wall, without using any third-party cheats or hacks.

[Steps to Reproduce]

Set up a 1-block thick solid wall (e.g., Obsidian or Stone).

Have Player A stand completely tight against the wall inside a 1x1 corridor.

Have Player A raise and hold a shield facing the wall.

Have Player B stand on the exact opposite side of the wall.

Player B looks directly at the wall where Player A is standing behind and swings an axe or mace.

[Observed Results]
Player B's attack bypasses the solid block entirely, striking Player A's clipped hitbox and disabling Player A's shield through the wall.

[Expected Results]
The solid block wall should completely block any melee attacks, and the shield should not be affected or disabled from the opposite side.

https://youtu.be/dj3H3Jbx7fw https://youtu.be/V5lhtXSZXvw 1.21.11