Please try editing /etc/pulse/default.pa and comment out all of this:
### Should be after module-*-restore but before module-*-detect
load-module module-switch-on-port-available
### Use hot-plugged devices like Bluetooth or USB automatically (LP: #1702794)
.ifexists module-switch-on-connect.so
load-module module-switch-on-connect
.endif
Please try editing /etc/pulse/ default. pa and comment out all of this:
### Should be after module-*-restore but before module-*-detect switch- on-port- available
load-module module-
### Use hot-plugged devices like Bluetooth or USB automatically (LP: #1702794) switch- on-connect. so switch- on-connect
.ifexists module-
load-module module-
.endif
Then reboot.