Could not detect bluetooth device - qt.bluetooth.bluez received advertising error

Question

I am using ubuntu 18.4, bluez 5.58. The bluetooth module is executed with 'root' privilege. During power up of embedded device(using cypress BLE module), the advertising fails with error : "qt.bluetooth.bluez received advertising error". This issue happens intermittently.

I tried to restart the bluetooth module - /etc/init.d/bluetooth restart and call the advertise interface again. But the issue still happens.

<policy user="root">
    <allow own="org.bluez"/>
    <allow send_destination="org.bluez"/>
    <allow send_interface="org.bluez.Agent1"/>
    <allow send_interface="org.bluez.MediaEndpoint1"/>
    <allow send_interface="org.bluez.MediaPlayer1"/>
    <allow send_interface="org.bluez.Profile1"/>
    <allow send_interface="org.bluez.GattCharacteristic1"/>
    <allow send_interface="org.bluez.GattDescriptor1"/>
    <allow send_interface="org.bluez.LEAdvertisement1"/>
    <allow send_interface="org.freedesktop.DBus.ObjectManager"/>
    <allow send_interface="org.freedesktop.DBus.Properties"/>
  </policy>

Does anybody know how to resolve this ? or Is there any retry mechanism to be implemented ? Thank you.