Hi Rob,
I’m sorry for the trouble you are having. Please see this article on relay ports:
By default, the Main, Aux & SFP are all part of the same layer 2 bridge interface used for both end-to-end layer 2 traffic and IPv4 management. By configuring a port for relay function, it is taken out of this bridge and therefore will no longer be usable for IPv4 management of the node. I believe this is the issue you have experienced before recovering. Another way to think of the relay port is an OPEN/R layer 3 port.
Can you please clarify what you are trying to do here:
Have you seen this video on installing a simple relay topology?
https://learning.cambiumnetworks.com/learn/course/993/play/3410/60ghz-cnwave-installing-a-relay-topology
Thanks,
Jack