How to use Unreal Insights for networking?

I’m using 4.24 and trying to get the new Insights tool working for networking. I added the “NetTrace=1 tracehost=localhost -trace=net”
command arguments to the parameters in the editor.

And it logs some things fine, but there is nothing for networking. I connected to localhost before beginning the play session, it says connected, and logs
no network traffic
Has anybody got this working?