BT functionality gone

THE issue:
The bluetooth hardware device has didn't find/turn on/connect to some other external and paired/added devices.

Symptoms:
The command $ sudo systemctl status bluetooth.service Shows:

bluetooth.service - Bluetooth service
     Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled; vendor preset: enabled)
     Active: active (running) since Sat 2022-02-12 12:38:25 -03; 11min ago
       Docs: man:bluetoothd(8)
   Main PID: 1325 (bluetoothd)
     Status: "Running"
      Tasks: 1 (limit: 8123)
     Memory: 1.5M
     CGroup: /system.slice/bluetooth.service
             └─1325 /usr/lib/bluetooth/bluetoothd

feb 12 12:38:25 systemd[1]: Starting Bluetooth service...
feb 12 12:38:25 bluetoothd[1325]: Bluetooth daemon 5.53
feb 12 12:38:25 systemd[1]: Started Bluetooth service.
feb 12 12:38:25 bluetoothd[1325]: Starting SDP server
feb 12 12:38:25 bluetoothd[1325]: Bluetooth management interface 1.20 initialized

The command $ rfkill list Shows:

0: phy0: Wireless LAN
        Soft blocked: no
        Hard blocked: no
1: hci0: Bluetooth
        Soft blocked: yes
        Hard blocked: no

The command $ dmesg | grep bluetooth shows:

[13.253973] bluetooth hci0: Direct firmware load for rtl_bt/rtl8723b_config.bin failed with error -2

Sources asked:
Source 1
Source 2
Source 3
Source 4
None of then solve the issue. Any ideas?

Workaround:
The issue was solved after hard restart from suspend/sleep (black screen) mode.