Mesh Friend replies to initial Friend Poll with "old" security credentials

[thomasstenersen]

Occasionally, after terminating and re-establishing friendship multiple times, the Friend will reply to the LPN's initial Friend Poll with the credentials used in the previous friendship.

From the LPN's side we see

# Successful attempt:
# Friend offer (normal security material [NID=47])
Net RX   (enc): 47955516BFB3264921E351BCE0EEC1BE1DA544EB03ABE395 
Net RX (unenc): 47800000000001000204281003E90000A41D002000000000

# Friend Update (friendship security material [NID=4D])
Net RX   (enc): 4D6CAAA6CA85DEB3C275A64C65589892ACDA6F5F77371CA7
Net RX (unenc): 4D80000001000100020200000000000001000000E0FB0020


# Failed attemt:
# Friend offer (normal security material [NID=47])
Net RX   (enc): 47D9CDD39D533989577D38096195DD04B49C4DAD28458CCD
Net RX (unenc): 47800000020001000204281003E7000000000000014A0200

# Friend Update (friendship security material [NID=4D])
Net RX   (enc): 4D6CAAA6CA85DEB3C275A64C65589892ACDA6F5F77371CA7
Net RX (unenc): 4D8500400200000002000000ED470100A41D002000000000

This is the standard samples/bluetooth/mesh example on v1.13.0.

[jhedberg]

I suspect this got fixed by the fix to #12449. Please reopen if the issue still persists.