The bug

Dirt paths and farmland are designed to be 15/16 blocks tall, as can be seen from the model files. However, a keen eye reveals that they appear to be ever so slightly shorter than this, as the pixel below the topmost pixel of the adjacent block is visible without needing to clip the camera inside of any blocks.

As the model files themselves are not at fault here, this issue is very closely related to MC-169897 and MC-246224, as neither the door nor the cauldron/composter/hopper model files are flawed, meaning the game's handling of them must be at fault.

How to reproduce

1. Make a path block be directly adjacent to a full block such as a grass block
2. Look very closely

Expected results

Only the top row of pixels on the side of the grass block would be visible, with the rest fully occluded by the path.

Actual results

The second row of pixels from the top is just barely visible even though it should not be.