Invisible layers in Sketch when using Material UI as the basis for UI component library [on hold]

I'm trying to use the Material UI Theme Editor which spits out a Sketch file as the basis for our component library. I'm then exporting the components to Zeplin for developers to get specs on.

However, I've been unable to get the ripples to show up in Zeplin, and they don't even show up when one UI component is created from the base sympbol in another part of the the Material UI file (here's ours: https://www.dropbox.com/s/lqnc4vsjia3sqbo/Baseline.sketch?dl=0).

This makes no sense to me...how could the "RIPPLE" that I can see so clearly on the base component disappear from this instantiation of it? I think the fact that I can't see it in Sketch is the root of the trouble, and why I can't see it in Zeplin.