@Alexandre. Hi Alex, thanks for your suggestions, I was able to solve the issue. Turned out that the power supply of the main Deco was triggering the behavior. You AP suggestion enabled me to...

@Alexandre. Thanks for coming back so quickly. I used one of the satellites as main and it had the same behaviour: WiFi active for two minutes and then flashing yellow, no more WiFi. Unable to update...

Deco M5 has been working fine for years now. Suddenly wifi stopped yesterday. Rebooting router and main disk only brings back working internet for two minutes. Then the main disk goes from fixed...