Can't Change Eye Color in CAS

I've read that some cc's can cause problems in Create a Sim, which will disable the ability to change eye color. Sometimes when I load my game, I can change them, but other times the eyes are stuck at brown and there aren't any color swatches shown. I use Remus Sirion's "Transgenic" default eyes. I like them a lot more than the base game eye colors, and it's the only custom eyes I have in my game.

Last week, the eyes magically started working, but now they've stopped again. I'm not sure what causes the problem. Does anyone know? Sometimes it works and sometimes it doesn't.