Player can mine the block underneath a Cushion while sitting on it

Description:

When a player is sitting on a Cushion, they are able to mine the block directly beneath the Cushion. This allows the player to break the supporting block while remaining seated, causing the Cushion to drop as an item. This behavior is inconsistent with expected interactions, as sitting on an entity should not grant the ability to reach through it to the block below.

Steps to reproduce:

1. Place any solid block on the ground (e.g., a dirt block).

2. Place a Cushion on top of that block.

3. Right-click the Cushion to sit on it.

4. While still seated, aim at the block beneath the Cushion and hold the break key (left click) to mine it.

5. Observe that the block is mined successfully, and the Cushion drops as an item once its support is removed.

Observed result:

The player can mine and break the block directly underneath the Cushion while sitting on it.

Expected result:

While sitting on a Cushion, the player should not be able to interact with (mine) the block beneath it, or the Cushion should block the interaction entirely.

System Version: Windows 11 25H2(26200.8655)