Just in case this comes up for everyone else, I found a solution - I reset the router and Linksys Velop system, switching Apple HomeKit support on/off. It seemed to sort the firmware update that was stopping Arc from working.
Just in case this comes up for everyone else, I found a solution - I reset the router and Linksys Velop system, switching Apple HomeKit support on/off. It seemed to sort the firmware update that was stopping Arc from working.