How to get pavucontrol to use corresponding icons for all positions?

I installed:

flatpak info org.pulseaudio.pavucontrol
PulseAudio Volume Control - Adjust the volume level of hardware devices and applications

     Kennung: org.pulseaudio.pavucontrol
         Ref: app/org.pulseaudio.pavucontrol/x86_64/stable
 Architektur: x86_64
       Zweig: stable
     Version: 5.0
      Lizenz: GPL-2.0+
    Ursprung: flathub
    Sammlung: org.flathub.Stable
Installation: system
 Installiert: 13.3 MB

Laufzeitumgebung: org.freedesktop.Platform/x86_64/21.08
Sdk: org.freedesktop.Sdk/x86_64/21.08

      Commit: fb65141c782782dadec050b3cf9c8d23d373f38f6e66fe9712695b65205f9XXX
      Parent: fa4bcaea8cb3fed1ab92226c1c44a43ad1c03b8952715a506ed44f1a8580aXXX
     Betreff: Use libcanberra from shared-modules (530199ec)
       Datum: 2022-01-05 22:37:29 +0000


OS: Arch Linux x86_64
Kernel: 5.19.13-arch1-1
Uptime: 1 day, 20 hours, 55 mins
Packages: 1667 (pacman), 132 (brew), 94 (flatpak)
Shell: bash 5.1.16
Resolution: 3840x2160
DE: GNOME 42.5
WM: Mutter
WM Theme: Adwaita
Theme: Adwaita [GTK2/3]
Icons: Adwaita [GTK2/3]
Terminal: gnome-terminal
CPU: 12th Gen Intel i5-12500 (12) @ 800MHz
GPU: Intel Alder Lake-S GT1 [UHD Graphics 770]
Memory: 7151MiB / 15724MiB

All dependencies are installed

flatpak permission-show org.pulseaudio.pavucontrol
Tabelle Objekt Anwendung Berechtigungen Daten
background background org.pulseaudio.pavucontrol yes 0x00

pavucontrol only shows one single icon on left for cards and sinks when running. It is the one for system sound. All other positions show the folded sheet of paper with lifted corner and exclamation mark - meaning not found.

How to get pavucontrol to use corresponding icons for all positions?

I have same issue also on Fedora 36 Desktop.

Please file your bug in the correspondent issue tracker below:

If the bug is related to flatpak packaging then packagers will notice and fix it.