uBlock Origin has blocklisted PolyfillIO in it's badware list
github.com
github.com
https://github.com/polyfillpolyfill/polyfill-service/issues/...
the goodguys now live here:
https://web.archive.org/web/20240229133014/https://polyfill-...
https://github.com/polyfillpolyfill/polyfill-service/issues/...
it doesnt take long.
i find it muchmore telling that it is being sanitized.
that givves me a reason to believe its intentional behavior