Signs textures does not correspond to the actual texture of their handle

Signs textures does not correspond to the actual texture of their handle.

On the signs item texture, the handle got the same color/texture as the actual "plate" of the sign.

However, all the handle textures on the item should correspond to their handle on the block. The most blatant examples are the birch, acacia and jungle signs.

Here could be the new textures: