What kind of patching activity? Initiated by bsa or outside of bsa?
Was the port in use and you couldn’t figure out what was using it or it was not in use at all?
This can happen when the rscd port 4750 is being used by any other process. If you are running, shavlik engine on this server, there are chances that it may capture the port 4750. See if you have a service called hfnetchk running on this server. If you can reproduce the issue right now, see what process has captured port 4750.