This only happened recently it was fine for a long time. My pc connected via ethernet and laptop via wifi both are connected to the deco but have no internet. My phone sometimes can connect to the internet but will also be gone after some time. The guest network seems fine most of the time but will also lose internet from time to time. I tried playing around with the fast roaming and beamforming which will temporarily restore internet to the pc and laptop but will be lost once the pc and laptop are turned off or restarted.