They have somewhat of a routing table for next hop routing with direct messages, but only for the hop that your node heard the message from. That way, when you send a message in reply, it goes back to the same node that gave you the message to begin with. And then that node passes it off to the node that it heard that message from, etc, etc. But that's only for direct messages and was introduced in 2.6 back in like February 2025. They had a blog post about it if you're interested.