Textures slightly offset under wall blocks

The Bug

Hi! I have known about this for a while, and it unfortunately triggers my ocd. When you place a wall block (any type) by a full block, the texture under the wall is slightly offset, and it flashes.

Steps to Reproduce

• Obtain a wall and block.
• Place the wall next to the block, floating in the air so you can see the underside of the wall.
• Fly right up against the underside of the wall and move your camera slightly back and forth.
• Observe the edges of the pixels.

Observed Behavior

There is slight z-fighting due to the overlapping of the wall extension and the main body.

Expected Behavior

There would be no z-fighting. This could be achieved making the "extension" shorter, so it doesn't extend into the main body.