NFA may fail to poll SNMPv3 devices if you have multiple SNMP profiles with the same username.
When using Wireshark to SNMP poll the device you may see a response Report with the OID - 184.108.40.206.220.127.116.11.1.5, which means:
Release: RAIB1H99000-9.3-Network Flow Analysis-Interface Bundle-Hardware
Delete the SNMP profiles with the duplicate user name so that there is only one profile with that username.
To decode the SNMP reports from the device in Wireshark, you can go to Edit->Preferences->Protocols->SNMP.
Then Edit the "User Tables" and enter the SNMPv3 username, password, Authentication model and Privacy protocol/password that you are using on this device.