Approximately every other day, my Apple TV 4 requires me to re-enter my Apple password. I wouldn't mind so much, but I make my passwords long and complex and it's a pain in the tuchus. I thought it might be due to disconnections with the router, but the router logs are fine. The Apple TV is hard wired to an Airport Extreme, which is hard wired to a Motorola SB 6121 router. All of my other networked devices are fine, including the Apple TV 3 in the bedroom. Why can't Apple TV 4 remember my password?