I have the latest Time Capsule and every so often it significantly loses wifi speed over large distances, I'm talking every month or two. Connection strength stays the same though. When it loses wifi speed, other devices closer to the Time Capsule are unaffected. What could be the cause of this? I have several devices which connect to the Time Capsule: iPhone 6, iPad Air, iPad Mini, Apple TV 2nd gen. Mostly the iPhone 6 and iPad Air are in the room which I lose wifi speed on every so often so seems like a Time Capsule bug maybe? Anyone else get this problem?