Some sides of chests have inconsistent pixels with each other

Closely relates to other minor pixel difference bugs, such as MC-1483, MC-130015 and MC-219843.

The bug

The left side texture of normal single chests have a few pixels that don't match the other sides (front, right and back), the most notable being near the top-left and bottom-left, which are much darker on the back side than on the front and sides, which have these pixels a lighter color.

How to reproduce

These mismatching pixels can be made very obvious in Creative mode via use of a debug stick and spinning a single chest around, but a keen eye works as well:

1. Observe the front of a chest, paying attention to the top-left and bottom-left
2. Observe the right of a chest, paying attention to the top-left and bottom-left
3. Observe the back of a chest, paying attention to the top-left and bottom-left
4. Observe the left of a chest, paying attention to the top-left and bottom-left
5. Note that the left side of the chest has some pixels that are darker than those on the left side of the other three textures

Expected results

Either the four sides would generally match each other and this minor discrepancy wouldn't exist, or the different sides (left, back, right in particular) of a chest would be much more significantly different from each other such that differences like these wouldn't matter.

Actual results

We have this incredibly minor difference on a few of the sides.