We are also seeing this. Has there been any resolution?
Sample error from our syslog:
Aug2613:36:4210.241.0.6MSM760-Local-iprulesmgr:SG1113N03BDiscardingRADIUSAccountingRequest (id='91') fromRADIUSClient (ip-address='169.254.8.119',port='33810') becauseofmissingusername. (CheckyourRADIUSSecretconfiguration.)
Jim Ketterer