I had the same issue. If you run systemctl status bluetooth.service
on your host and you get an error message similar to this:
Nov 28 23:12:56 server bluetoothd[508]: profiles/sap/server.c:sap_server_register() Sap driver initialization failed.
Nov 28 23:12:56 server bluetoothd[508]: sap-server: Operation not permitted (1)
it has something to do with the SIM Access Profile of the bluetooth stack.
you could try deactivating the SIM profile. In /etc/systemd/system/bluetooth.target.wants/bluetooth.service
replace ExecStart=/usr/lib/bluetooth/bluetoothd
by ExecStart=/usr/lib/bluetooth/bluetoothd --noplugin=sap
reload the daemon systemctl daemon-reload
restart the service systemctl restart bluetooth.service
check if error persists systemctl status bluetooth.service
In my case the error was gone and after HA reboot, my bluetooth dongle worked like before.