OSC Server / Client fixed IP address not working

Hi! I have successfully got OSC messages Into BluePrint using the OSC plugin and, worked out how to use those to control aspects of a MetaSounds, which is really cool!

However! The incoming OSC only seems to work with IP 0.0.0.0

As soon as I target to the specific IP where the OSC messages are coming from, it stops working. I also can’t send messages from the client, presumably for the same reason.

What am I missing?!?!

Update - I disabled wifi on both the sending and receiving computers to force them to use the wired LAN connection and it worked!
Is there a way to tell UE5 to prefer / only use one specific network connection?

I have no answer, but am very interested in knowing it!