Unauthenticated Pairing failed - Bluez

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I am able to pair my nrf52832 after with the nrf connect phone app But when trying to do the same with Bluez I am getting authentication error I use the bluetoothctl tool to do the test .... Please see the example below : enter image description here enter image description here this is the btmon debug of the session when trying the pairing

Any idea why the pairing is failing all the time although I am able to pair using the nrf connect phone app ? Thanks a lot

I tried to change the pair command with no arguments still getting :

pair DE:D1:E9:6D:55:8C Attempting to pair with DE:D1:E9:6D:55:8C hci0 DE:D1:E9:6D:55:8C auth failed with status 0x05 (Authentication Failed) Failed to pair: org.bluez.Error.AuthenticationFailed hci0 DE:D1:E9:6D:55:8C type LE Random disconnected with reason 2

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