When invoking .to(..., ..., {scale: value}) GSAP seems to create a style="transform: scale()" property on the element which does not work inside SVG. It should be transform="scale()" which does work.
I'm guessing this is a negative interaction with the CSS plug-in. How can I force GSAP to use the correct property names?
The codepen demo demonstrates this by puling the scale value off _gsTransform in onUpdate and applying it to the "transform" attribute.