I've purchased 6 Sonoff Wall light switches, and 4 of them works perfectly. 2 of the switches, connected initially but constantly disconnected from my network. I've got a new, more powerful router, but after that, those two switches doesn't want to connect at all. I've tried the quick connect and compatibility mode with eWelink with no luck. The only similarity between the switches are that both of them are 1-gang, while the other 4 switches that works are either 2 or 3 gang. Any one had the same problem and figured it out?