Chiming in to say: I’ve had issues in the past where the WiFi router was factory resetting itself and it turned out this can happen if the power supply isn’t powerful enough for the device. In this case, I think I had gotten the WiFi router 2nd hand from Goodwill or something, and the provided power supply fit in the port, and it had the same voltage was an amp off, instead of being something like 12 volts 3.5amps, the plug was supplying 12v 2.5 amps, and I guess everything was fine until the init needed lore power (likely from routing high amounts of traffic, or more WiFi units connected)

I had no idea factory resetting could be the effect or something like this so I was at a loss for a while until I found the info online.