Months of solid performance now daily disconnects - what gives?

I bought this Orbi system (one satellite - the RBS50) several months ago, it's performed with no glitches whatsoever. Now it's dropped the connection the last two days, out of nowhere, requiring a power cycle to reconnect. My computer is hardwired to the router, not WiFi, however other devices connected via WiFi also cannot connect. When this happens I also cannot connect to the Orbi's configuration utility using hardwired OR WiFi connected computers.

My firmware version is V2.1.2.18 - after a little research I see the unit auto updates & that cannot be turned off without telnetting into the unit - nice move Netgear - not allowing us to disable updates that may (and in my case DID) screw the reliability of the system. Might wanna call the crew back in, lock them back in the room until they can devise a little button to turn auto update off.

Is there a new update on the way? If not what is the last known reliable firmware version and where can I get it? Resetting this P.O.S. daily isn't an option as I live with my disabled Father who cannot get to the router. He depends on the Internet connection for several things so reliability is mandatory. I travel a good bit for work so I'm not here all the time.