My 5g signal from 3 different Asus DSL-N55U routers is alternating on my Inssider display with the control channel switching on and off every few seconds. This happens on all 3 routers. Is it supposed to do this? The 2.4g stays on all the time. eg channel 1 + 5 solid but 5g 48 + 44 with the 44 turning on and off every few seconds.