I've noticed a similar issue in my log file. I'm running HG on Centos 7 with an Aeon Labs ZStick 2
2016-01-07 19:20:08.1365 Trace [[[ BEGIN REQUEST ]]]
2016-01-07 19:20:08.1378 Trace WaitAck
2016-01-07 19:20:08.1389 Trace Sending Message (Node=15, CallbackId=9E, Function=SendData, CommandClass=SwitchMultilevel)
2016-01-07 19:20:08.1408 Debug 01-09-00-13-0F-02-26-02-05-9E-57
2016-01-07 19:20:08.1458 Debug 06
2016-01-07 19:20:08.2471 Debug 01-04-01-13-01-E8
2016-01-07 19:20:08.2484 Debug ZWaveMessage (RawData=01-04-01-13-01-E8)
2016-01-07 19:20:08.2494 Debug ZWaveMessage (Direction=Inbound, Header=SOF, NodeId=0, Type=Response, Function=SendData, CommandClass=NotSet)
2016-01-07 19:20:08.2513 Debug 06
2016-01-07 19:20:08.2523 Trace SendDataReady
2016-01-07 19:20:08.3539 Debug 01-05-00-13-9E-00-77
2016-01-07 19:20:08.3552 Debug ZWaveMessage (RawData=01-05-00-13-9E-00-77)
2016-01-07 19:20:08.3562 Debug ZWaveMessage (Direction=Inbound, Header=SOF, NodeId=0, Type=Request, Function=SendData, CommandClass=NotSet)
2016-01-07 19:20:08.3582 Debug 06
2016-01-07 19:20:08.3591 Trace Complete
2016-01-07 19:20:08.3601 Trace [[[ END REQUEST ]]] took 222 ms
Any ideas on what this NodeID=0 is?