YouTube URIがonebox時にサムネイルをレンダリングしない

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  1. https://youtube.com/shorts/Cs3sTnLO6EE

  2. https://www.youtube.com/watch?v=Cs3sTnLO6EE&lc=Ugyi1VtrCVd2POTc82N4AaABAg#:~:text=A%20Screencast%20Of%20LinkedIn%20Persona%20Verification%20Failure

…become a transparent box:

image
image1475×447 25.9 KB

The DOM shows:

<img src="" width="480" height="360" title=" - YouTube" style="aspect-ratio: 480 / 360;">

However, they render when posted:

「いいね！」 1