I just setup 3 Deco M5s. No special setup. Everything setup ok. However my non main M5s keep blinking red. Very occasionally they'll turn green for a short time. But mostly blinking red. I tried moving one of them in the same room as the main unit and still, it is blinking red. I tried resetting it and it's still blinking red. At the same time my phone and other devices seem to be connected to it and working fine. The deco app is reporting all nodes online.
Model: Deco M5