Placing snow cover to side of block replaces current cover regardless of thickness

1. Make snow cover block with thickness > 1 (fig. 1)
2. Try to place snow cover at the same block using the side of the other (fig. 2).
3. Original snow cover is replaced by thickness 1 snow cover.

Stacking also fails if you try to use side of block above (fig. 3 & 4).