I recently installed a 3 node set of Deco P9. One next to my fibre modem, one downstairs and one in a distant shed. The two in the house say they are connected to one another with WiFi and always appear online in the app. But the one in the shed rarely connects via WiFi, it's almost always powerline. Often the app says it cannot be reached. Yet I know it's constantly operational as there are two Nest wildlife /security cameras streaming live video that are connected to it. The video streaming is never interrupted yet when the app says the powerline unit is not connected it equally shows that the two cameras are not connected and yet SOMETHING is allowing them constant access to the Internet. I think that the app is only using WiFi to show node status even if one has reverted to powerline only. If it can't get status over WiFi it should fallback to reporting status over powerline.