Hello, drop shadows from after effect are not rendered correctly. I've met this problem before when creating gaussian blurs in SVG. In order to be correctly rendered feGaussianBlur needs to have bounding box that is larger than the blurred object.
Strange thing though : shadows are correctly rendered in the Lottie Editor... but do not work in Lottie player. Are you planning to fix this ? I also use svgator to animate svg, and drop shadows effects are perfectly rendered and supported by desktop and mobile browsers.