Issue with After Effects mask expansion

Hi,

I have created an animation in After Effects with a cut out ellipse mask moving around the screen which eventually expands. It works great in After Effects but when I try to convert it to a Lottie file the expansion doesn’t work correctly. As the circle expands there is a second, non-transparent ring inside.

You can see the video on YouTube and the red circle is the transparent mask.

This is the Lottie
https://lottiefiles.com/141230-spotlight-reveal-effect

Can you share the link to the lottie so I can compare?