png inside svg don't render in image-overlay

[cesarpachon]

hello, congratulations for this fantastic project!
My issue is: I am trying to render a image-overlay that is a SVG file and withing the SVG file there is a PNG logo in the corner.
everything else renders OK but the PNG.
I made the file with inkscape, linking to the PNG instead of embed. So I tried embedding, but with same result.
Is there some restriction about PNG withing SVG or should the PNG be embed/linked in some specific way?
thanks!

[mifi]

Probably node-canvas doesnt support png inside svg