Every block above a cobblestone wall (vines, fire, barrier) turns wall into corner stone

When a vine is growing from above a Cobblestone Wall, the Cobblestone Wall suddenly becomes a corner Cobblestone Wall. Technically there is a block above so the game thinks it has to update it. However, it are only vines and not something is to be expected.

To reproduce:
1. Build a Cobblestone Wall
2. Place or let a vine grow ontop of it.