@CawlinTeffid Weird, it’s still working perfectly for me today. I have Pure Paste installed on my Mac—I wonder if that could be making a difference?
It’s one of Sindre Sorhus’s free apps on the Mac App Store.
It causes paste to insert selections as plain text globally by default. If that’s the reason it’s working for me, it may be that Obsidian (or Electron) is tripping over the conversion from rich text to plain text when it’s coming from the universal clipboard.