Button dont react when not directly on mashine

Since 1.1 or 1.1.0.2 there is a bug where the button doesnt activate a redstone device when its not directly on it.

Like when i putted the button on the block on front or next to it then nothing happend.But in previous version of mcpe it did even work when it was on the block on front or next to it and also in other platforms the button works properly.