I use a DELL Laptop with a docking station. If I disconnect the docking station and reconnect it, my wireplumber daemon usually runs at 100% CPU usage.

To fix this you have to restart the wireplumber.service. Since this daemon runs on a per-user basis you need to specify the --user flag. Otherwise systemd will not find wireplumber.

[tux@laptop]$ systemctl --user restart wireplumber.service

Important: Do not use sudo, if you are using the --user flag.
Otherwise you get this error.

Failed to connect to bus: No medium found