I have 3 M9 and 1 M5 that have been working in backhaul mode for many years. Randomly this has stopped. the main router is connected to only one device on ethernet. the other 2 are connected via wifi...

@Brook How am I supposed to know if my backhaul is connected on my V2 device? I can see from the app on my other V1 devices so assume it is but would like to know for sure thanks