There are some fonts that don't seem to export properly when printing to PDF using ArcGIS Pro. The only one I'm aware of is the Swis721 BT style. The result is an error within the PDF and dots where the text would've been. I'm not a fan of this specific font; it's just a nuisance since most of the templates that were handed to me when I took over my company's GIS department have this font, and purging it has been a constant hunt.
So, I was wondering if this is a known issue and if it's related only to this font, or others as well? I've noticed this issue with both version 2.2 and 2.3.potential bug