Ble_presence binary sensor stops working every time HA's dashboard is disconnected

Configuration
1

Hi.
I’ve a ble_presence binary sensor in my HA.

binary_sensor:
  # Presence based on MAC address
  - platform: ble_presence
    mac_address: 34:94:54:xx:xx:xx
    name: "ESP32 Remote BLE"

It works well until disconnect from my HA’s dasboard or restart my Raspberry PI on wich HA is running.
When I reconnect to HA’s dashboard the BLE devices is not detected too even if nothing has changed ad it is online too.
binary

Any idea?
Thanks in advance