Some fonts broken

[matthieugras]

font-family is: -apple-system, BlinkMacSystemFont, Segoe UI, Helvetica, Arial, sans-serif, Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol

Font being rendered: Helvetica

All other fonts are properly displayed.

Edit1:
Ok I think I found the problem, it renders a bitmap font instead of a proper font:
fc-match Helvetica
helvR12-ISO8859-1.pcf.gz: "Helvetica" "Regular"

Edit2:
As a workaround I substituted Helvetica with a different font in my fontconfig and linked it into the sandbox with flatpak override

[xhorak]

Copying from issue #114:
Please double check that you're using gnome platform from the flathub and not from gnome:
flatpak info org.gnome.Platform
look for Origin: flathub. There's been some issues with fonts and older gnome platform.

[mustafa1024m]

Hi, I am having the same problem, and gnome platform is installed from flathub, but it is old.
I am getting:
Warning: runtime/org.gnome.Platform.Locale/x86_64/3.24 is end-of-life, with reason: GNOME 3.24 runtime is no longer supported as of 11th January 2019. Please ask your application developer to migrate to a supported platform.

flatpak info org.gnome.Platform
error: Multiple branches available for org.gnome.Platform, you must specify one of: org.gnome.Platform//3.24, org.gnome.Platform//3.26, org.gnome.Platform//3.28, org.gnome.Platform//3.30

I think you should specify an exact version or latest.

[mustafa1024m]

This is still affecting Developer Edition, can you please check my previous comment.