Hanging sign texture turns black on Fabulous graphics

Put the summary of the bug you're having here

What I expected to happen was...:
Hanging sign texture would remain the same as what it should be

What actually happened was...:
Textures for all signs turns black when looking at them from most directions when using the graphics setting "Fabulous!"

Steps to Reproduce:
1. Turn on "Fabulous!" graphics in settings
2. Place any hanging sign on the side or bottom of a block
3. Move viewpoint around

4. Text color and glow ink on sign do not affect results