Carl, Steve here. Please take a moment to read my thread. I am a retired networking guy. There are a couple of common threads regarding the offline status. I would like to test thay beta release...

Has anyone tried gettong a static IP address for your modem to the ISP?

Range is not the cause. Have set up test environment with better than -40 db. Makes no difference. Still go off randomly.

Your experience is a near perfect match to my symptons and repair. A reboot of the router brings them all back. For clarity my wireless devices include HS105, DLINK W110, two arlo base stations...