I have 4 KS240 switches in my house.  2 of them operate correctly at all times.  The other 2 intermittently show red lights for the light and fan controls, then will reconnect and go white again.  I've restarted the affected switches, but it doesn't seem to make a difference.  If I restart the problem switches, they come right up and stay up for a few minutes or an hour or so, then go red again.  No other of my many KASA switches or plugs are having any connection issues, nor do anything else on my home network.  These switches are only about 2 years old.  I would hate to have to replace them so quickly.