Missing-image icon in Sound panel

[bertob]

I'm getting these icons for Tangram audio sources in Settings:

[sonnyp]

I did some digging and compared with an app that doesn't present the issue - Shortwave.

Both icons are at the same location

~/.local/share/flatpak/exports/share/icons/hicolor/symbolic/apps/de.haeckerfelix.Shortwave-symbolic.svg
~/.local/share/flatpak/exports/share/icons/hicolor/symbolic/apps/re.sonny.Tangram-symbolic.svg

However in Settings - it uses the icon-name de.haeckerfelix.Shortwave-symbolic for Shortwave and audio-symbolic for Tangram.

Looks like there are 2 issues.

Settings uses audio-symbolic as fallback but the icon doesn't exist - I filed https://gitlab.gnome.org/GNOME/gnome-control-center/-/issues/1910

GNOME can't figure out which app (Tangram) is outputting audio.

I can reproduce with Tangram, Tangram Devel and Epiphany
I can't reproduce with Epiphany Devel
(all flatpaks)

[sonnyp]

And here is the solution from Epiphany https://gitlab.gnome.org/GNOME/epiphany/-/issues/1716