[hackcrafter]

"Experiencing Issues" is way understating this.

I had two OnHub devices (different models) do this during business hours at two different places that ran on WiFi today.

The first I took as a complete fluke, but the second made me realize this was a Google issue.

They say it wasn't related to a software update, so what the hell resets a device into setup mode?

Power cycling did nothing, I had to re-configure the devices from scratch: switch to its setup network, use the Google WiFi (renamed from OnHub) app to set network name password, reset to bridge mode etc.

[Eridrus]

Latent issues can get exposed when something in the environment changes. Probably an interaction with some other piece of software that changed what it was doing.

Looks like the factory reset process is a little flakey but works to fix this, which seems typical for dealing with routers.