[bug] rending to block don't get an update

[lublak]

If i placed the redstone after the redstone on top i don't get rendered.

the other way around:

[dannydjdk]

The tiny dust on the top is rendering the connection, so as soon as something causes it to update, it will render it. To fix this, when dusts are placed, they're going to have to update the dusts above them.

FYI: This bug is strictly visual and shouldn't have any affect on behavior.