Smart Components across multiple masters

Hi there!

I’m having trouble figuring out how to work with smart components across multiple masters.
I’ve set up shoulderWidth and crotchDepth to the following component in regular.
I’ve done the same for the light but when I move the sliders on the light the component disappears.
I’m planning on adding one more master in case that changes anything.
What am I doing wrong?
Help please!

This happens when interpolation is not happening because outlines are not compatible or the smart component setup is wrong, or both.

Thanks for the feedback Toshe!
I have to have the variations in every single master, right?
i.e. : a width a crotch layer for each master?
I think the outlines are fine, I went through them over and over.
What can normally go wrong with the smart component setup?

Can you send me the .glyphs file please to support (at) (this website without www… or forum…). I will have a look.