I have a problem with colored multilayer glass

I tried to make a real rear tail lamp in a project, and I noticed that there are actually three layers of glass in the lamp, the transparent glass shell on the outside, the red glass shell in the middle, and the thick glass on the inside, just like the second picture. But when I make it, there is no problem that the light passes through two layers of shell to the surface of metal. I can see the beautiful red reflection, but when the light passes through the innermost thick glass, the red glass shell will not work. The part of thick glass is still white. Has anyone ever encountered similar problems? How to solve it, thank