No it does not. That’s my confusion. I have only seen it with the nodeinfo packet.
Also, when I send a text from one node, I get an “Acknowledge from unknown node” on the iPhone app.
That just means it got an ack not from the DM recipient, still have yet to see any indication that you have received a node packet from another mesh.
I’ve got my MQTT software running now to capture unknown Mesh IDs and store them in a file. As soon as one comes across I’ll post it.