Hi, it is me again.
After some digging, I finally found a page that is using polyfill: url https://www.blacksford.com/yellowstone-rv-rentals containing polyfill library https://cdn.polyfill.io/v3/polyfill.min.js?features=URL,Promise,Symbol,Symbol.iterator,Object.assign,Object.values,Object.entries,String.prototype.startsWith,String.prototype.endsWith,Intl,Intl.~locale.en-US,Intl.~locale.en-CA,Intl.~locale.fr-CA,Intl.~locale.en-AU,Intl.~locale.en-NZ&flags=gated . Please remove this.
Do note that this might not be the only page containing polyfill library, you will need to scan ALL of your pages.