...when using animation json that contains raster images:
https://imgur.com/a/nQ1bEkk
The sample json works perfectly in the Lottie viewer:
https://lottiefiles.com/share/O8IXXn
I should note that switching to react-lottie (https://www.npmjs.com/package/react-lottie) ended up fixing the issue, but I'd prefer to use lottie-react-web since the general implementation as a React component seems to be better.