@David-TP Thank you for your response. Just to update you, the Deco M4 started showing online on its own after I restarted the Deco M5 unit. I did not make any other changes or switch the backhaul...

I need help understanding an issue with my Deco mesh setup that recently started, even though it worked fine for many years. My Setup Main unit: Deco M5 Satellite units: 3 × Deco M4 Backhaul:...