Visual glitches on grass block, cactus, trapdoors, and copper grates when Mipmap Levels are ON

When Mipmap Levels are set to anything other than OFF, several blocks appear with visual glitches or incorrect rendering in the inventory or in the world.
The issue disappears completely when Mipmap Levels are turned OFF in the video settings.

Affected blocks:

• Grass Block

• Cactus

• Spore Blossom

• Trapdoors with holes (e.g., Iron Trapdoor, Jungle Trapdoor, etc.)

• All types of Copper Grates

Steps to Reproduce:

1. Open the 25w43a snapshot.

2. Go to Options → Video Settings → Mipmap Levels and set it above OFF.

3. Open your inventory.

4. Observe that some blocks render incorrectly (visual artifacts or missing parts).

5. Set Mipmap Levels back to OFF — the problem disappears.

Expected Result:
Blocks should render normally regardless of Mipmap Levels.

Actual Result:
Certain blocks have graphical glitches when Mipmap Levels are ON.

Additional Information:
Screenshots showing the issue are attached below.
The problem seems related to how mipmaps are generated for blocks with transparent or detailed textures.