Steps to reproduce:
Look at any website that allegedly uses the system UI bold font or formatting (correct me if I'm wrong), including this website. If the title is wrong, feel free to correct it.
Did you try using Compatibility mode? Yes.
Did you try using a clean Orion Profile? Yes
If applicable, does Safari behave in the same way? No.
Expected behavior:
The bold text should show but it's showing the Helvetica Neue UltraLight font instead.
Orion, OS version; hardware type:
0.99.124-beta (WebKit 616.1.10)
MacBook Pro (macOS Mojave 10.14.6 build 18G9323)
Image:
Orion:
Safari:
On github.com/github
Orion:
Safari: