I have a single quad on the front and back of my brick that uses the BOTTOMLOOP texture, and while it's fine with normal paint colors, if you use any FX paints on it (except for Glow), it'll cause the faces to disappear and only be visible at lower angles
Normal angle

Lower angle

Another strange thing is that even though the ghost brick renders both sides of the faces that make up the brick, it can't render the outside of the two faces, just the insides (this isn't a case of inverted faces, i tried that, didn't work)

So why is this happening and can i fix this?