My Nest keeps dropping offline. I don't think it's restarting (if I knew how to get uptime info out of it I'd tell you), but lately most times I bring up the iOS Nest app my Nest shows up as offline and doesn't respond to new settings from the app. If I walk over to the Nest and go to its network settings and look at the list of wifi access points, it connects easily and then shows up online, but it doesn't seem to stay there for long periods of time.
The Nest is sitting about 6 feet away from the Almond Plus, which is running firmware AP2-R066-L009-W016-ZW016-ZB005. Maybe I should try a newer firmware.