Bug#1019420: xfce4-pulseaudio-plugin volume icon flickers

[as@php.net]

Package: xfce4-pulseaudio-plugin
Version: 0.4.4-1
Severity: normal
X-Debbugs-Cc: none

After upgrading to 0.4.4-1, adjusting the volume seems to make the
panel icon flicker. Other actions like seeking on a video in VLC or
Parole, or using a video conferencing in a web browser also cause
this.

I tried compiling the latest version. It still happens there but not
as reliably.

-- System Information:
Debian Release: bookworm/sid
  APT prefers testing-debug
  APT policy: (500, 'testing-debug'), (500, 'unstable'), (500, 'testing')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 5.19.0-1-amd64 (SMP w/8 CPU threads; PREEMPT)
Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
(ignored: LC_ALL set to en_US.UTF-8), LANGUAGE=en_US.UTF-8
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages xfce4-pulseaudio-plugin depends on:
ii  libc6                    2.34-7
ii  libexo-2-0               4.16.4-1
ii  libglib2.0-0             2.73.3-3
ii  libgtk-3-0               3.24.34-3
ii  libkeybinder-3.0-0       0.3.2-1.1
ii  libnotify4               0.8.1-1
ii  libpulse-mainloop-glib0  15.0+dfsg1-4+b1
ii  libpulse0                15.0+dfsg1-4+b1
ii  libwnck-3-0              40.1-1
ii  libxfce4panel-2.0-4      4.16.5-1
ii  libxfce4ui-2-0           4.16.1-1
ii  libxfce4util7            4.16.0-1
ii  libxfconf-0-3            4.16.0-2

Versions of packages xfce4-pulseaudio-plugin recommends:
ii  pavucontrol  5.0-2
ii  pulseaudio   15.0+dfsg1-4+b1

xfce4-pulseaudio-plugin suggests no packages.