On Wed, Jun 05 2024, Eli Zaretskii wrote:
> Does Vertico display the character of the preview's current line in
> some special face, like bold or italics?  If so, it could be that the
> font used to show these symbols doesn't have the variant needed for
> that display.

I realised that I don't only have vertico, I also use marginalia, which is
responsible for the faces. Disabling marginalia (but keeping vertico) gives a
much more spartan look, but the issue remains: