I’ve been working on some color fonts, and unlike earlier designs, they will have to usable for others this time. There is currently a bug with the export of color (layer) fonts which will add all your components to the exported file, resulting in an unusable typeface. (with a pretty long glyphs panes.) With the color removed it all works fine, as each component is set to non-exporting, but it seems the color layers override this.
The happens with both methods: When the components have color layers themselves or when they are placed in a color layer in the character itself.
I found this topic which notes this problem. Is this the same bug? (as the post is from some years back.)