I have been a happy user of 3 units of M9 plus for last 13 months. One of them now refuses to connect, with red light blinking. "Disconnected from other Decos". The back-haul is not even wireless, but

According to https://www.tp-link.com/us/support/faq/1794/ , mixed backhaul (wired + wireless) is not supported. >> Note: The Wi-Fi backhaul and Ethernet backhaul won’t work at the same time. When two