Good analysis! The Librespot add-on still creates warnings, and probably affects other add-ons, even when not in use.
Remove that add-on for another test.
2024-04-14 12:39:52.867 T:1072 debug <general>: Librespot: pactl load-module ('module-rtp-send', 'destination_ip=127.0.0.1', 'inhibit_auto_suspend=always', 'port=24642', 'source=librespot.monitor'): 15
2024-04-14 12:39:52.880 T:1050 debug <general>: Sink changed
2024-04-14 12:39:52.885 T:1072 debug <general>: Librespot: pactl suspend-sink ('librespot', '1'):
2024-04-14 12:39:52.885 T:1072 debug <general>: Librespot: pulseaudio modules loaded: ['14', '15']
2024-04-14 12:39:52.885 T:1072 debug <general>: Librespot: ['librespot', '--bitrate', '320', '--device-type', 'tv', '--disable-audio-cache', '--disable-credential-cache', '--name', 'Librespot@himinbjorg', '--onevent', 'onevent.py', '--quiet', '--format', 'S24', '--dither', 'tpdf', '--initial-volume', '100']
2024-04-14 12:39:52.886 T:1092 debug <general>: Librespot: onevent dispatcher started
2024-04-14 12:39:52.887 T:1093 debug <general>: Librespot: librespot thread started
2024-04-14 12:39:53.069 T:1093 debug <general>: Librespot: *** WARNING *** The program 'librespot' uses the Apple Bonjour compatibility layer of Avahi.
2024-04-14 12:39:53.069 T:1093 debug <general>: Librespot: *** WARNING *** Please fix your application to use the native API of Avahi!
2024-04-14 12:39:53.069 T:1093 debug <general>: Librespot: *** WARNING *** For more information see <http://0pointer.de/blog/projects/avahi-compat.html>