Just an Update
Well after lots of trials it does look like this is in the AltUi plugin in OpenLuup, stopping Openluup with
and then SSHing into the pi and reloading it with
connects to the Arduino gateway without a problem and without the multiple reload of Luup.
Clicking "Reload Luup Engine" from the misc menu in AltUi always results in multiple reloads 5-10 times.
Changing an attribute of a device in AltUi prompts a single reload of Luup again connecting with the Arduino gateway fine without the multiple reload cycles