Top snow has inconsistent collision for dropped items

Steps to Reproduce:

1. Place or find top snow;
2. Drop items towards it.

Observed Results:
With one layer of snow, the items will collide with it as if it were a full block. With two layers, it acts as a barrier that's two blocks tall. Beyond that, they'll get pushed to the side, sometimes clipping through the snow itself and hover over the ground that's supporting it.

Expected Results:
The item correctly checks for the top snow's actual collision.

Screenshots/Videos attached: Yes

Notes: This doesn't seem to affect other entities from what I checked.