some urls load in iframe, others do not

this works:

<WebView
  ref={webview => {
    this.webView = webview;
  }}
  onLoadEnd={this.onWebViewLoad}
  onMessage={this.messageEvent}
  startInLoadingState={true}
  javaScriptEnabled={true}
  source={{html: `<iframe src="https://www.youtube.com/embed/cqyziA30whE" allow="autoplay; encrypted-media"></iframe>`}}
/>

this does not:

<WebView
  ref={webview => {
    this.webView = webview;
  }}
  onLoadEnd={this.onWebViewLoad}
  onMessage={this.messageEvent}
  startInLoadingState={true}
  javaScriptEnabled={true}
  source={{html: `<iframe src="https://www.youtube.com" allow="autoplay; encrypted-media"></iframe>`}}
/>

why is that?

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[JeremyBradshaw7]

Isn’t it the same issue as https://github.com/react-native-community/react-native-webview/issues/804 ? Workaround is on there, but it’s not an ideal solution.