Hi,
I’m using OMG with RF2 , and it sends commands randomly to CHACON power plugs, switch it ON and OFF.
I seen this in the MQTT log and they are commands not sent by Home Assistant and as there is log entries , it should be (?) the Gateway as the powerPlugs are just receivers (not a returning status entry).
I’m without clues on how to troubleshooting this , and for the time I blocks me to have this working 
Thus any have any idea how to troubleshooting aiming to identify and correct this issue ?
You need to break it down by component and by connecting to the serial console of your openMQTTGateway you should be able to see if the messages are received by OMG and what is being sent.