Texture disappears when adding Volumetrics

I don’t know if I’m missing something here or if it’s a bug. But, when I add volumetrics, regardless of density, One of my textures just disappears (or flips?) in some way. It’s not happening with any other objects in the scene except for the top metallic piece. Anyone have any insight into why this happens and how I can go about fixing it?

Okay is there something different for the olympus logo and one of the scales that ist dissapear?