I just got confirmation that the message is the Status Reply message from the Hansa eInvoice server.
The client wants to know why this message shows up in the log every 10 minutes.
parameters.txt file has --verbosity=debug
Could that be the reason?
Actually a new version of this bug is SL>>Reports>>Periodic customer statement "accumulates" amounts
Not sure why it was duplicated, I clicked "submit"only once....