Item entity's 3D model does not render the item edges properly

When a stack of items is dropped into the world, the rotating animation of the item doesn't fully render the side edge, which seems transparent and glitchy.

It looks like the front texture plane of the model has a transparent edge, which extends the full square, and is rendered in front of the side edge of the 3D model as it rotates around itself. Difficult to explain, but added a screenshot.