Audacious - OLD, PLEASE USE GITHUB DISCUSSIONS/ISSUES

I'm using audacious 3.9-2 (Audacious 3.9 (Ubuntu package)) on Lubuntu 18.04.
When playing something with audacios, I get this message about four times a second in the systemd journal:
indicator-sound¹³³⁶: Received property Position with type x does not match expected type i in the expected interface
As far as I know, indicator-sound is the volume adjustment in the panel (image in the attachment)
If I play something with vlc, I get this message only one time (not 4 times each second), if I use mpv, avplay or something else, I don't get the message.
I don't know why the message appears, I just recently found it.

I can reproduce this:
open a terminal and run $ journalctl -f
play something with audacious
view the messages appearing in the terminal window