Had my devices (3) for a couple of years, no issues. Until recently.

I have one in the living room, one in each bedroom.

Main Bedroom device stopped working a few weeks ago, and has been flashing Yellow ever since.

Living room device now doing the same. Cannot get the device into pairing mode (flashing Blue).

I was using the M4 as a router, but I have now gone back to using the (FTTP) router that was supplied when the cable was fitted.

I have a physical lan cable from the router to the M4, but the router still cannot see it.

When I try to add the add the M4 (out of pairing mode), it initially says all is good, and then a split second later it flashes up that it cannot see Deco ( is the app using cached information?)