I have 3 SSIDs setup on my Asus RT-AC68U router namely ASUS_Guest, ASUS and ASUS_5G. All are set to WPA2-Personal and AES. I have connected my HTC One M7 to the 5GHz SSID ASUS_5G but my wifi disconnects sometimes and when I go to Wifi settings on mobile I see "Failed to connect to ASUS_Guest"...