When placing a wall using /setblock without specifying a block state, it is invisible; default state has up=false

The bug

When you run /setblock ~2 ~ ~ minecraft:cobblestone_wall an invisible cobblestone wall will be set (aka, every single block state is false). I would have expected the wall to have the block state up=true, so it is visible.

To reproduce

1. Run /setblock ~2 ~ ~ minecraft:cobblestone_wall
2. Apparently, nothing happens
3. Run /setblock ~2 ~ ~1 cobblestone
4. Now, the wall appears.