Raw Content Embeds inheriting a white fill background around the frame in Pro 6.8

Hi all,
I have a couple of embeds with a white fill background that I can’t seem to get rid of, even with CSS. This is happening with 6.8. It also happened with 6.7 but went away with the 6.7.12 (or maybe 6.7.13, I can’t remember) update.

The embed in question is Cal.com though I doubt that really matters. See screenshots. Thanks!

Can you send us a live site to look at? Or in a secure note send use the iframe URL you are using? Have a great day.