This is a scene of a Camaro in an unlit environment. It's meant to be pitch-black until the keyframed emission material turns on. As you can see from the first image, the material shows in material view, but in rendered view (and in an actual render) the other headlight doesn't show. I tried it in eevee and it works fine. Any ideas on why this would happen? I'm not sure I changed anything significant between when it did work and now.
I am using Blender v2.83.2.
Below I also provided some images of settings I thought were important to this question. Let me know if there's any other information I should provide.