module-combine for simultaneous output to all audio device could have been loaded by turning on the option in KDE settings
But module-combine or module-combine-sink are not shown in the list of modules
see this for dealing with the 2 default bluetooth modules
Journalctl pulseaudio error after latest update - #6 by nikgnomic
PulseAudio usually has 2 modules loaded by default
module-bluetooth-policyandmodule-bluetooth-discoverto disable the modules, use this command to add comment tags to the configuration file
sudo sed -Ei '/load-module module-bluetooth*/s/^/#/' /etc/pulse/default.pa